Install the app
Ls rpm signal. I think the Crank sensor may be bad.
Ls rpm signal. Confirmed the wiring is correct. a copy of your tune *msq file* 3. Do another datalog to see if it sends any signal, there is a PID to do it. Since you have already been down that road, Case #2 was a 2000 trans am with L92 swap with a converter box for crank and cam signals. After pinning the ECM the included pull-up resistors must be wired as shown in the following diagram to obtain a signal. Dec 20, 2014 · This plug and play solution lets you quickly and easily install the auto meter 9117 tachometer adapter onto your LS-derived engine. 5 mins into it running it shut off like a GM used two methods of receiving a park/neutral signal to the PCM Going back to the 80s with TPI systems, there was a single (ORANGE/BLACK) wire that was grounded to indicate to the ECM that the vehicle was in P/N. I have the racecapture pro mk3 with the obd2can but the signal keeps cutting on and off so i decided to wire the sensors directly. May 7, 2020 · LS engine computers output a 4 cylinder signal even though these are V8 engines. I made sure to replace it with a MC33072 Engine won't fire. Aug 4, 2017 · Help! Tach Signal Disappears - Holley HP EFI Open Discussion Dec 6, 2019 · When an LS conversion involves a vehicle that uses a cable driven speedometer, generating a useable VSS signal is optimal. I've installed the Terminator X Max on a 2015 Chevy Camaro LS3 that I have installed in a '55 Chevy Bel Air. Plugged everything in and it ran great. Tech guy says the newer units are extremely sensitive to crank and cam sensors and some sensors that will fire GM ECUs won't fire Terminator X ECUs. I get around 100 +/- 10 rpm cranking. Jun 18, 2015 · I sent in the DL and SL files to Holley. Feb 13, 2015 · GM Gen III LS PCM/ECM: Crankshaft and Camshaft Signals Guide includes instructional photos, checklists, and step-by-step instructions on upgrading to the GM Gen III LS-Series PCM, ECM, Electronics, and POWERTRAIN CONTROL SYSTEMS Apr 5, 2015 · Hey everyone. There are two readily available means of generating a useable VSS signal to the PCM (computer) - a cable driven VSS generator or a GPS unit that outputs a pulsed VSS signal (Dakota Digital offers both of these options). I also for shits and giggles reloaded the latest version of V4 Aug 8, 2023 · HiJust did a harness for 1jze on fuletech 550. a data log of you cranking the engine over so i can check for any sign of rpm Sep 12, 2010 · I have an LS1 blow thru set up fitted to a 300zx. It was originaly a 8cyl car so my tach should be reading half as much, but it just reads pegged out on start up. Engine starts & runs, just doesn't idle great due to this erratic RPM. May 14, 2024 · I started with the pre-made LS tune from APM EFI, and modifed it for my engine size. 3. It toggles from Stall No rpm signal but sensor has to be working somewhat if I?m getting spark and running right?I?ve replaced crank sensor and same symptoms. Tach output of termX is v8 signal and works just fine with the stock tach. Where do I change tach pulse output in the software? Jun 7, 2022 · Get the Best Performance with Auto Meter LS Plug & Play Harness with Tach Adapter Includes 105-9117 Tach Adapter 9123 parts at JEGS. I'd like to hear from the guys who've done it and if a resistor is needed, specifically what resistor and where do you put it? I'm thinking along the lines, if a resistor is sometimes needed, just do it while I have the wiring all apart. Without an RPM signal no spark will be generated and no fuel will be delivered. 2 knock Feb 22, 2020 · C5 Tech - Crank no start / no rpm's when cranking - I have a crank no start issue. When you said you disconnected the cam angle sensor, did you do that electronically in the ECU, or just unplug it? Jun 18, 2018 · This Plug and Play solution lets you quickly and easily install the AutoMeter 9117 Tach Adapter onto your LS-derived engine. I'm having a problem with my fresh install of Holley Dominator. AutoMeter 9123 RPM Signal Adapter for LS Engines (Includes Plug & Play Harness) $ 192. I have a Tech 2 and I am not showing rpm's when cranking. It is a complete pull-out (confirmed running by seller) and I had harness modification and PCM unlock done by a provider on ebay. Voltage drops to 10. It also uses a 1x cam sensor (again hall effect) which reads high or low indicating the valve position. The time now is 05:51 AM. MSD is not showing an rpm signal while cranking. The location of the CMP is on the top rear center of block. Do not apply an excessive amount of pressure to try to force the terminal into its location. Changed sensor still no rpm. Output tests seem to work as well. If you’ve tried to get your tach to function after an LS swap, you know that it isn’t always a simple procedure. The RPM cycles between sync (during the 58 crank teeth) and Stall (during the 2 missing crank teeth), but never registers a valid RPM. I tried to do a System Log, and I THINK I got one done. does anyone know Jun 30, 2022 · Hi All, I've had this installed for 2 weeks or so and have one more issue to tackle before I start fine tuning. Does anybody know what the resolutions would be for a factory V8 tach? thanks Jun 26, 2023 · Originally Posted by Danny Cabral The Terminator X doesn't record System Logs because it's only capable of external datalogging (PC software or 3. Please help! Dec 23, 2020 · 3. Battery is good to go. one was a silverado ss, he had no spark but I don't remember if he had rpm signal. However, it isn't quite a simple plug-and-play, because the output of the engine ECU in the controller kit (and in factory ECUs from GM Jan 6, 2020 · I installed a holley system on my l76. It will crank, but it will not start. I tried to hook the tach up today and got incorrect rpm readings. Assuming that you don't have an ignition box, would you entertain putting one in? Most of them have a tach out signal, which is perfect for a MS system, a good example is the one V8Kid posted. This year with my new build I am experiencing issues with the car not starting when hot, I sometimes do not get an rpm signal. The PCM uses this info a provide signals to the ABS, IPC and the infotainment system. 17 revolutions per second 11 revs per second * 29 pulses per rev = 324 pulses per second = 324 HZ I verified 324 HZ with my fluke at 670 rpm. I know these errors are an issue during normal operation, but it's not clear what I should expect during cranking. When cranking the engine I get no rpm reading in tunerstudio. I fixed the 12V problem going to the pink wire and it now has a constant 12V even when cranking. I'm not receiving an RPM signal on the 3. Apr 30, 2018 · What do you do if you have no rpm input signal showing on the Holley and it will not start? I tried the TPS auto set a bunch of times, tried two different MSD ignition boxes and verified the red/white wire has voltage when cranking. Mar 2, 2018 · PY Online Forums - Bringing the Pontiac Hobby Together > General Classic PONTIAC TECH > EFI Tech > Sniper EFI RPM Signal-MSD Ready To Run Distributor When OEM ECU is reading the sensor in parallel, split this wire with OEM sensor negative - Do not connect when using hall effect sensor. Any time the engine RPM is below about 400 rpm, the ignition control module is directly controlling the amount of spark timing advance. I've attached the tune, it's completely stock other than I used this method to fix the tach signal on my 2003 PCM with an Autometer 5" tach. Oct 1, 2023 · The datalog shows no RPM signal. Checked over my wiring and it is proper. Feb 14, 2010 · Can you post up a picture of how you have your board setup? It kinda sounds like your not getting a cam signal into the ecu to sync the rpm signal, a few things that could help me figure this out for you are 1. Mar 15, 2021 · It almost sounded like the cam timing was off, but I always triple check that before I put the engine in. You posted some conflicting information and you really are posting no numbers/data (except a "0" rpm that isn't consistent): 1. Also should be noted that I am using a front mount LS2/3 style timing cover for a front mount CAM sensor and using the 5V from the TPS to power that sensor Looking at the datalog Aug 7, 2017 · LS1 RPM stay at 0 but crank and cam signal are good by Suprazz » Mon Aug 07, 2017 12:12 am I have a strange issue here. Any thoughts o Help! No RPM signal. You can get a black front mount cam sensor and use it with a 12V LS1 harness. When i had my harness modified, and my pcm tuned, the We're having an issue with an LS3 we've swapped into a 72 Chevelle. There are a lot of things that can do this. That one turned out to be a ground for the coils that was missed and not attached to the block. Into the ignition harness I'm using a Holley cam/crank ignition harness part number 558-431. What is the process used and what pins, functions have May 10, 2017 · Rpm or tach signal Forced Induction - V8. everything single thing is working, except the Tach gauge. No Spark No Start troubleshooting. The Holley Terminator X RPM output is a 12V square. I cant seem to get the signal to get picked up by my racecapture pro mk3. RPM (Crank/Cam Signal Inputs) Diagnostics The following are shown for the “RPM” parameter which indicates the status of the crank sensor/engine speed input. White fitech wire is getting voltage during start. SIRHC LABS - 2018 Nov 30, 2021 · I am using 3 on my 5. Andrew HP EFI Tuning & TechI'm in the process of trying to start a new LSx engine with the Holley HP ECU. What's confusing me, when I ran it batch-fire, I can watch the pulses get bad at 4900-5000 RPM, but at 6000 RPM they're much cleaner! How does the signal cleanup again? Jul 30, 2018 · This was a running combo last October. Crankshaft sensor (CKP) Apr 3, 2013 · It started out losing RPM signal and Id have to let the car sit for 15 minutes or so and off I go untill it heated up and (rinse and repeat) so I replaced the sensor and problem solved untill today. I'm running a msd flying magnet wheel with holley hall effect crank sensor. LEDs on the Terminator X showed flashing green on cam sensor (LED 7), and flashing red on the crank sensor (LED 6). 0L LSx engine with a 24x reluctor to my new LSx 388 with a 58x wheel. The ignition module interprets this input signal and generates an output signal to the ECM that is used to determine engine RPM speed (known as distributor reference pulse). It's now doubling the stock RPM at idle. Attached is the tune and a short log for If you’ve tried to get your tach to function after an LS swap, you know that it isn’t always a simple procedure. What is your setup? I have found the MSD trigger wheel with the Holley Hall Effect pickup is a pretty much bullet proof crank pickup and the GM Vortech cam sync setup for the cam sync has also been perfect for me to 8500. If you do, it has something to do with the connection to the distributor. Coils, Injectors, and all other sensors have checked out. There are many different tooth patterns used by different manufacturers. The baro reading appears to be correct, but the MAP value is 120 which seems odd during cranking. HELP! Jump to Latest 13K views 36 replies 12 participants last post by Pro Stock John Jan 24, 2009 W Aug 16, 2015 · I'm using the green wire for TPS (falling voltage) and also the green wire on the coil pack for RPM signal. So I replace the crank sensor and rpm signal is restored, but now it’s firing in what seems to be in the wrong order. I’m assuming zero sprk then. Jul 6, 2024 · C3 Tech/Performance - LS swap - tach is off - 78 stock gauges running LS with term X. Jul 19, 2022 · I’ve got an LS9 in my 1973 Trans Am. 5” screen reads stall and no rpm on turn over of the ignition. Mar 5, 2009 · 28 - Main oxygen sensor signal (on right bank) 29 - Sub-oxygen sensor signal (on right bank) 31 - Air flow meter signal 35 - HAC sensor signal 41 - Throttle position sensor signal 43 - Starter signal 47 - Sub-throttle position sensor signal 51 - Switch condition signal 52 - No. You can see the similarities on the blank sections on top of the narrowing of the AD signal as rpm rises. - RPM Signal settings are located on the Quick Access Panel under Engine Settings. I had a customer who had a LS and he was having all kinds of crank signal issues and it turned out to be exactly this. I fired it up and it was sounding awesome. 5" TSLCD). Let it sit for 20 minutes and the thing cranked and I drove it back toward civilization . White wire to white wire and pink wire to 12v start and run. I've checked the ground and power sources with a digital multimeter. I have a Lq9 in my 95 gmc with terminator x. Most of these builds use the GMPP engine controller kits, which provide a tach output for the factory dash gauge. Aug 27, 2025 · They count up errors on the Crank and Cam signals so it would be interesting to plot that over your Engine RPM plot and see if it even thinks there is a problem. For Gen I small-block Vortec and Gen VI big-block Vortec engines, one rpm equals one set of four crankshaft signal pulses. At least, not DC voltage readings like you're making. Aug 19, 2018 · As a rule, the LS series engine uses a high resolution VSS signal as a direct input into the PCM. The injectors, coils, and the fuel pump all test normally using the test mode in Tunerstudio, but i noticed this afternoon while trying to start it that i'm not getting any RPM signal during cranking. May 8, 2014 · Has anyone figured this out for the E40's? I'm putting an LS2 into an E36 and the tach won't respond to frequency changes. Using modified stock harness, stock ECU (from 2010 GMC Truck/6. TACH NOT WORKING CORRECTLYIn this video Im just going over some common issues that people have with tachometer function when swa Feb 14, 2007 · I'm a hooking up an eboost 2 and did a search and can't seem to find which wire on the ECU to splice into for the RPM signal wire. Putting a custom built 5. Should I switch it to 8 CYL/4 PULSE? Tach PDF info below: Autometer rpm gauge . I’m having the same issue where occasionally it will idle great but I go and start driving it and it’ll buck and start losing rpm’s and surging. Checked the wiring from the HEI to the Fitech ecu and found whoever installed it tapped into it for the external tach in the truck. I confirmed the HEI distributor is working properly. Everything is installed and configured. 3 to gain or climb RPM's due to the Abuse Mode settings in the ECM. Apr 24, 2023 · The black 24x crank sensors are 12V (LS1 gen3) and the light colored 58x crank sensors are 5V (LS3 gen4). I know the battery is weak. The radio gets louder as you drive. The 99-02 LS1 PCM receives a ground on pin 34 of the LS1 BLUE connector to indicate P/N. As I give it gas say 2000-2500rpms is about 300rpm higher than handheld. New turbo 5. I Thinking even the it has a cranking signal, its cranking too slowly. A dozen high/low frequency changes did nothing. The ls1 tach output is 6 resolutions High and low. Pull a plug wire and put a used spark plug into the boot, with the ground strap of the plug touching the alternator case have somebody crank the engine. Let me know what I should check over. When it does this, I cannot accelerate further until I come down in rpm then it is as if nothing Jun 15, 2010 · I am debugging the AC setup and am trying to use the PCM to control most/all of the AC functions. I have an LS1 harness and LS2 front mounted cam sensor, this required changing the cam Making the tach work using the LS-series engines The GM LS-series engines are very popular in SL-Cs, making up over 70% of all engine selections. picture of the top side and bottom side of your megasquirt board 2. 58/2 To verify this I entered 1/1 in the HIRES/LORES fields and hooked up my trusty Fluke to the tach signal at idle 670 rpm = 11. In this video, i will be showing you how to install an aftermarket rpm gauge on your ls swap anything! Super easy!Need16 gauge wirecrimpers1k 1/4 resistor rp Jul 27, 2017 · I have an LS1 swap into a kit car. I see throttle movement so the TPS is working. Tried 6 like suggested and it was double the actual RPM. I'm cnp with a efi connections cam sync plug. GM 4. However I do not have spark. As soon as the engine fires the RPM signal appears to go away. Jan 25, 2023 · I'm just finally getting my LSx swap up & running, and I'm having issues with Erratic RPM with CAM/Crank sensor issues. I am using DIYAutoTune's pre made harnesses. The minimum requirement for the trigger to run an engine is to have one tooth (pickup event) per spark event. The mid 90s introduced Mar 1, 2023 · So have you done all this (especially the RPM signal)? • Typical No-Start Checks: Is the battery fully charged? Have you performed a TPS Autoset? Is the engine cranking fast enough (100+ RPM)? Does the Data Monitor display legitimate cranking RPM? Does the Data Monitor display legitimate sensor values? Does a Datalog indicate any RPM Errors? Is the throttle blade (s) open far enough to start What was the part number for your harness. My son have been building this engine for years now and finally got it to run. Did you recrimp the red wire and the purple or one or the other? Trigger Signal Sometimes referred to as the Reference, the Crank Sensor, or the NE signal, the Trigger Signal tells the ECU what RPM the engine is running at. I'm using typical LS style sensors with the 24x reluctor. I get no spark, no start, and no RPM signal. 8L, 5. The cam and crank sensor lights on the Sep 9, 2025 · Re: LS1 PCM tachometer output signal issues « Reply #4 on: April 11, 2018, 06:23:40 PM » Quote from: halfspec on April 11, 2018, 10:40:42 AM Unfortunately voltage readings aren't going to help diagnose your problem. 0* Cam Sync Signal Cam sensor type - Hall/VR with Pull-Up Cam Sync Position Angle - 187. I've attempted to start the engine. Crank Sensor test Feb 1, 2021 · The car also had erratic RPM signal, showing proper RPM, but having ERR spikes down to 0 RPM and the tach output saying ERR frequently while running. My problem is that I get no rpm signal out of the PCM. Fuel pump turns on and adequate pressure with initial starting fuel pulse. If you have a GM HEI style dist they recommend running a filter or a MSD to clean up the signal as HEI style dist`s have a very dirty signal. If a regular datalog indicates an "RPM Error" when scrolling through the problem area, then troubleshoot why the crank or cam sync unit isn't transmitting a signal. 0L. Please also note that if your tachometer is set to 8 cylinder, this will not keep your tachometer from operating. I had a harness modded for my truck. Thanks Aug 31, 2014 · So far everything is working great after my swap, except I have no reading on the tachometer. Reading online it seems like it won’t start till it picks up rpm and I can’t seem to get it to read any rpm, just says STALL!. Sep 19, 2024 · I have a 5. Ideal for vehicles with late model engine swaps and applications where LS1 Computer is not reading RPM's so no fuel or spark. Not Used 817 VSS Signal 1227 TFT Sensor Signal Pin "L" -- Not Used 1687 Ignition Retard Signal EBCM only (Factory) 1589 Fuel Level Sensor Signal (Factory) -- Not Used 719 Low Reference IAT Pin "A" -- Not Used 2129 Low Reference Ignition Coils bank 1 (1-3-5-7) 2130 Low Reference Ignition Coils Bank 2 (2-4-6-8) Hello, I have a NON stock setup. Do you guys see a problem with this crank/cam signal? This is for 24x LS1 with 1x cam. 3 gen IV Chevy LS from 2009 suburban into my 69 galaxie hot rod convertible. Car will start, run for maybe 1-2 seconds and dies. AUTO METER 9123 RPM SIGNAL ADAPTER FOR LS ENGINES, INCL. I'm also not seeing any RPM signal when using VCM scanner (along with a speed of 158mph). I have the nagging rpm noise issue. Jul 26, 2011 · How To Test The Crank Sensor: GM 4. My current setup is on 4 CYL/2 PULSE from my GM LS OEM harness. I'm counting 58 crank teeth and 4 cam teeth in the System Log as expected. You should see the spark. They seem fine. It does rev up and it obviously very Jul 29, 2018 · Dominator EFI Tuning & TechHello. Originally thinking it might be power related, I've since replaced the alternator from a 105 amp unit to a 145 amp Sep 6, 2018 · Found codes for RPM noise and have no tach signal. - So did a datalog while trying to start it and noticed that my Crank signal (RPM parameter) is very choppy and drops to 0 (or reads error) every so often in a consistent pattern. However, it is kind of a big one. Feb 17, 2008 · If I take the "signal" wire on the tach and repeatedly tap it to a 12V power source (simulating an AC signal) the needle does move around, up to 7k RPM. Any ideas? Rebel LS start up issues with home Nov 21, 2008 · LS1 looses crank signal at 5200/5300 rpm and backfires nasty. What is a hires and lores signal? Aug 11, 2019 · Without tach signal, the unit will not fire injectors during crank. The only item left is the idle increase when the AC is On, it goes up a few hundred rpms but then almost immediately goes back to idle rpm. If I turn the ignition off and restart everything appears normal until I go under load above 4000 RPM. My blue fitech wire is on the coil negative post, and I'm getting spark to the distributor. Eventually the car shuts Aug 28, 2008 · C6 Corvette General Discussion - Where to get Tach Signal for LS3 - Trying to find the tach signal for a 2008 LS3, what is everyone using? Thanks Oct 29, 2012 · I see no RPM, no injector pulse, no MAP reading and no timing advance. 3l swap, Current Performance Wiring harness -All other gauges and warning lights May 28, 2017 · LS1 tach signal by carlos88 » Fri Aug 17, 2018 3:54 pm I have a 2004 gto ls1 engine swap into my 240sx. I believe I wired it correctly. Nov 29, 2022 · You’ll learn the possible causes of an engine cranking but producing no RPM signal and how to tackle this common car trouble. How to read and clear diagnostic trouble codes on 1990-1994 Lexus LS400's. If I remove the spark plugs and crank the engine, it shows rpm and also has spark. All you do is hook one end of a 1000 ohm (1K OHM) resistor to the tach wire, and other end of resistor to key 12v+. Getting a signal from the CPS when I bump it that goes from 0 - 12v alternating but still unable to see it in HP tools. Charging and will try again tomorrow. Got a reply back that they don't see the cam or crank signal being a problem. 0 *BTDC Cam Sync Reading Mode - Single Tooth Sensor edge - Rising Window filtered detection Oh boy have I gone down a rabbit hole. Show 5 volt on ref wire good ground and signal wire shows 5 volts. But this is rpm, crank signal and crank AD. Shop Now at the Guaranteed Lowest Price! Jun 11, 2014 · We show you how to properly wire and troubleshoot the tachometer signal from your LS1 ECM to your existing engine swap, to fix your LS1 tach Sep 13, 2021 · We offer some advice to a reader who's trying to get their tachometer to work in a vintage Chevy Nova with a modern LS engine swap. I have the full ecu unit wired to the engine and I am able to read most sensor values such as TPS, IAT, CLT, etc. I now have no RPM signal again, but there?s still power at the crank angle sensor plug. The LS1 24x reluctor wheel uses a hall effect sensor and generates a square wave signal which is used to determine crank position. The tach always reads about 1/2 the actual RPM. 1 knock sensor signal 53 - Knock control signal 55 - No. My issue is at idle the tach is reading 100rpm higher than the termX handheld. I'm still new to the Holley EFI. Crank Sensor Test. 3L, 6. PLUG & PLAY HARNESS 4. Aug 25, 2014 · LS1 24x - Lost sync Reason 91 - bad rpm signal, won't start. Engine is in the car ready to run, problem is there is no spark. Remove blue wire, with key on, tap end of blue wire on positive battery post. Let’s start with the basics. That is the preferred method of hookup as it is the cleanest rpm signal available. 50 I need to calibrate my tach after doing an LSX swap in my 91 Z. Just has a hard time cranking it seems. Because of this, it seems to be a crank position sensor issue like the sensor itself, wiring cooked from This video goes over how to spot a cam and/or crank sensor error in a Holley EFI or Terminator X DatalogsTime Stamps:0:00 - Intro0:35 - Adding diags to data Nov 11, 2019 · As you can see from the datalog below, I'm getting RPM signal during cranking, but the signal drops to zero and Diag #6 error count increases at that time. With engine running, LED # 6 is red and # 7 blinks. At Prestart Checklist Before starting the engine, double check for leaks, proper wire routing, any wiring hazards or loose nuts and bolts. It was running rough so I got my tuner to build a new tune for me for break in and flashed it today. 3 pcm reads a 4 cylinder signal. Save time, frustration and don’t make a single cut in your factory wiring with… Dec 7, 2017 · Do a system log and see if your crank/cam sensor signals are dropping out. Any suggestions? I have a LS1 in my 3rd gen camaro. Did not really come up with anything searching here and on the LS forum website, so here goes. Swapped the 12V pins to 5V, swapped the A & C wires on the cam harness, put two brand new sensors in, switched the tune to 58x in the Holley program, checked all the grounds Yes, I have a cam signal and it drives and idles perfectly fine otherwise. Or is there some other place I should hook the wire to? Can anyone help please? Mar 8, 2023 · New ECU now shows RPM when cranking on handheld screen, but will not fire even with adding gas manually. Oct 23, 2018 · That said - I am sure that the most common cause of a loss in rpm signal is a CKP or CKP wiring issue. I am having trouble getting a 2005 dbw lq4 swap running. OEM spec connectors and wiring assure a hassle free installation that takes minutes rather than hours. Tags:None Danny Cabral Administrator Join Date:Dec RPM Signal and TPS Locations for popular applications NOTE: For most multi-port injected EFI vehicles you can get a tack (RPM signal) from the negative side of any fuel injector. Hi, I diagnose an issue with the ECM not allowing the recently swapped 5. 2001 Gen 2 Blazer, 5. Remove the terminal and verify it is oriented correctly. Plenty of ICP pressure and a weak crank don't necessarily go hand in hand 2. Tech Support Email: te******@*******fi. Aug 19, 2011 · The pcm monitors this signal for any problems and sets the appropriate DTC (diagnostic trouble code) for loss or degraded signal. I'm just another weekend warrior trying to get a project up and running. I removed the external tach wire with no difference. Will work perfectly until I get to around 2500 rpm, then engine cuts out as if there is a rev limiter and stutters. What can I check to diagnose the problem, need help with this, dont have time to wait 30 to 45 minutes on hold for fitech support. Troubleshoot the crank & cam sensors, wiring, reference voltage & ground May 15, 2024 · The crank signal appears to come back eventually and Diag #6 stops climbing. I'm on the last stages of my forged 6. The pcm provides the +12V power, ground and signal return for the CMP. I have been getting a "stall/sync" reading on the data monitor when I crank the engine, sometimes an RPM reading will briefly flash, sometime an "Error" will flash. Car just flat quit on a 45 minute ride and no RPM signal. Sep 11, 2024 · 3. RPM's seem to cut in and out. Essentially, this means the engine control module (ECM) isn’t receiving accurate information about the engine's revolutions per minute (RPM). I was previously using the Gen III LS Crank Position Sensor (24x), but after Experiencing symptoms of RPM Noise such as code 36 or RPM going up to 59000? We're covering culprits and solutions of RPM Noise Aug 24, 2019 · You have the RPM signal for the FI tech coming from the MSD box? You have no interference then. This is a 2 pulse/rev output which may correspond to a 4-cylinder setup in some Mar 18, 2020 · 9117 RPM Signal Adptr - Distrbtrless IgnThis fully potted, weatherproof module can be wired into the power supply of a coil per cylinder ignition system, where it senses current and creates a conventional 12V square wave signal output which can be utilized by AutoMeter tachometers and many aftermarket RPM activated devices. If not, the crank sensor is bad or Jan 17, 2025 · I’ve been finishing up a typical LS project. It seems from reading a heap of info on the net Oct 26, 2024 · Trying first start up on my Rebel LS, not getting any codes but home % error and not getting RPM Signal. 0L LS engine with a 24x reluctor to my new LSX 388 with a 58x wheel and 4x timing chain. Check your timing pointer to determine the crank index position and enter that information in the "Crank Index Position (Degrees)" field in FTManager. 7 stars out of 13 reviews (4. I have reached out to Holley a few times over the last few weeks and no one has gotten This Plug and Play solution lets you quickly and easily install the AutoMeter 9117 Tach Adapter onto your LS-derived engine. I've turned off both VATS1 and VATS2, disabled starter checks. I can see it crank with oil pressure and battery voltage. May 7, 2017 · Holley Dominator V4 with an LS2 main harness. from what i understand, the OBS tach cluster reads a 8 cylinder signal, and the 5. I also notice Feb 16, 2025 · P0654 code signals an issue with the Engine RPM Output Circuit. A loss of this signal will result in longer starting times. This method was carried through 2002 for the Camaro/Firebird only. 3 build and I am unable to get the engine to fire up. Since the ECM is Jan 1, 2025 · PCM Diagnostics & Tuning - Holley Terminator X Crank issue not firing - This has been whooping my ass lately. 0 with h/c/i and I’m trying to get the first start with the new terminator x but can’t get it to read rpm signal so it won’t even attempt to fire, all wiring is done following the Holley instructions, checked all power and grounds, new battery with lots of power, engine is grounded LS SWAP TACHOMETER PROBLEMS. Save time, frustration and don’t make a single cut in your factory wiring with… LS swap no spark? LS Crank No Start? PSI Conversion has the solution with our guides and directions to help you in need. but it has coil packs any advice or help. I'm using an ms3 goldbox I'm able to have a clean cam and crank signal on a lr4 engine (24x so ls1 setting in the ignition option). I tried the 'crank' setting instead of 'frequency' but then the tach needle just doesn't move (even with a pull up resistor). Does anyone know if the white wire on pin 10 still have the RPM output? Was there a change in '05 or earlier? May 6, 2023 · Sbc with Terminator x no crank signal. Feb 13, 2015 · For LS-series engines, one revolution per minute (RPM) equals one set of 24 crankshaft signal pulses. 3 LS form a 2005 yukon, that was the donor engine for my swap. The ABS is 3 channel, meaning no speed sensor at both rear axles. Mar 23, 2009 · Been looking for the article on wiring a tach on a ls motor and can't seem to find it. I’ve got 12 volts to both hot and signal wire. Try to crank again, it’ll only fire on one cylinder, then it just loses rpm signal all together. Autometer suggested using a resistor which didn't help, So I just changed the resolution until it worked. It Jun 8, 2009 · RPM signal if there are 2 possible codes, its possibly refering to the cam rpm sensors, one of mine (drivers side) had its cable rubbing against the serpentine belt Oct 17, 2022 · I posted something earlier today about how my car wouldnt start with an EFI attached and I think ive narrowed down the problem. Feb 19, 2018 · Fault code 12 Help!! Holmsey Feb 19, 2018 error fault code 12 ls400 rpm signal 1 wont start Nov 17, 2020 · good afternoon all i just want to put out some of the things we learned this weekend about troubleshooting a no start issue on the 5. I did find an issue with the cam sensor. May 4, 2017 · Dominator EFI Tuning & TechHey guys. First one using Speeduino. The car wouldn't go into Closed Loop or Learn. Is this a logical conclusion or am I missing Aug 8, 2019 · We have checked grounds = Good ( Double checked and cleaned all surfaces again) Checked Spark = Good Fuel Pressure = Good 62psi Getting Crank signal = RPM 120-150 cranking (verified I have 24x sensor) I borrowed ecm from a friend that has system not installed yet =Still same issue Tried multiple times on installing tune into computer = Still The highest resoulution tach output signal is 29 pulses per revolution. (I’ve done several LSx cam swaps). With engine running Diag # 6 numbers climb quickly, Diag # 7 sits at 0, Diag # So you’ve installed your Ultimate LS system and you are excited to crank the key for the first time, suddenly it does not start, do you wonder if you missed a step? On today’s Tech Tuesday we are going to go over the common mistakes made with the Ultimate LS System. 2). Oct 12, 2013 · I have seen 2 similar cases. To VR sensors, use the shield wire the sensor shield. I'm on the last stages of swapping out my forged 6. The car cranks but will not start at all. I have an LQ4 LS motor with an MS3X. Crank and cam sensors show signal into PCM on a scope but no RPM registers on scan tool while cranking. Apr 13, 2014 · It will only display cranking RPM even when in batch fire with the cam sensor completely unpluged. 5" TSLCD. My engine does not have a distributer. Thanks in advance. Oct 3, 2022 · Something we see posted countless times on facebook groups is the age-old question, how do I get my tach to work with my LS Swap? Well, today we’re here to dissect that question and hopefully, provide a solution. Sprung for this Holley Terminator X kit and got it to run but it is running rich and computer is not registering rpm so it will not idle. May 4, 2020 · I'm looking to see what I need to do on my Auto Meter 2650-1165-00 RPM Gauge. Went through the setup wizard successfully, did the tps reset on the drive by wire, have an rpm signal. 7)| 13 ratings Check if this fits your vehicle Add vehicle May 29, 2010 · RPM SIGNAL Forced Induction - V8All times are GMT -5. I've been having issues with a no RPM, no start situation. This is a great time to visually inspect the overall Sniper EFI install. I'm pretty sure it's something stupid but I dont get it. Jun 1, 2024 · Disabling the cam sensor and running batch-fire, it will rev past to 6000 RPM, but I can still see in the System Log that the crank pulses & cam pulses are going haywire. How does a tach actually work? A tachometer, rev counter, tach/tacho uses elec Yesterday I was trying to get my car running again, and am having trouble getting a rpm signal to the fitech. The voltage at the tach signal line just sits at ~14V. I think the Crank sensor may be bad. This Plug and Play solution lets you quickly and easily install the AutoMeter 9117 Tach Adapter onto your LS-derived engine. Thing is, car still wont start, and my EFI doesnt detect any RPM's Hi- New to the forum and to LSx. Jan 9, 2021 · C5 Tech - No spark, No start, No RPM logging CKP is good - I just recently did a rebuild and cam swap and fired my car up a week ago. Shop that did the install wired up the original gauges to work with the senders and bulkhead outs for the Crate LS9. by pac1085 » Mon Aug 25, 2014 3:27 pm Hi, My first time installing Ms3/MS3x on a LS1 24x (only familiar with 60-2 wheels from past experience) U7 is not an LM2904. Jun 7, 2020 · Hey everyone! I'm new to the forums, but not new to EFI. Jun 24, 2012 · I finally got my swap done. Mar 17, 2024 · have an 87 5. RPM Signal Crank Sensor Type - Hall/VR with Pull-Up Crank Sensor Edge - Falling Crank Trigger Pattern - 60-2 or 58x (at crank) Crank Index Position - 78* 13 teeth 0. It's a long shot, but if you don't have enough clearance between the flexplate and the converter, the converter can be ballooning at high RPM and pressing up against the thrust bearing. You need to put a resistor in the wire to boost it's signal for the tach to work with an LS computer. This is the info I found for making the stock tach work with the LS signal: “A tachometer signal is included in the bulkhead connector (see below). New to the forum and new to the Terminator X EFI. com… Feb 4, 2021 · Dominator EFI Tuning & TechWhat are the possible causes for not achieving RPM Sync when the System Log DOES show the correct number of cam & crank pulses? This is a 58x/4x setup. Some things of note: It does not seem to command an injector pulsewidth VATS has been disabled, and I performed a full write Noid lights show no injector activity Spark tester shows no spark The fuel pump does kick on With the exception of the IAT, all of the engine variables seem about right MAF seems the same whether I Nov 1, 2019 · Frustration - Microsquirt RPM input deathYea, it sounds like the problem is the filter in the module to deal with the voltage input. I am having issues getting an RPM reading of any kind. I need to tie the green wire of the new tach into something to read the rpms. After maybe an hour of run time it just shuts off. pdf Tags:None andrewb70 Senior Jan 11, 2025 · Good afternoon. Replaced the crank position sensor and checked all the wiring which looks good. Swapped the 12V pins to 5V, swapped Mar 27, 2024 · It's an automatic. Feb 1, 2022 · It covers several of the most common stock and aftermarket ignition systems from popular manufacturers, and shows you how to find and use each ignition system’s tachometer signal to drive your tach. If not, then inspect your blue wire carefully. 3l from a 2007 silverado 1500 put in a monte carlo and I’m trying to figure out were my tach signal wire is. I Jun 1, 2024 · Hey guys, just swapped a terminator X into my 88 fox and can’t get it to start. 19 Black Shielded Cable (Red) RPM signal input Connected to the crank trigger sensor (hall or magnetic) or to the distributor. 3l swap with PSI harness and LS1 P01 ECU. Sniper 2 on a 454 with Hyperspark plug and play. You should get an RPM signal. 5v when turning it over. so this weeked we tried to do a test fire and make sure all the wiring was hooked up Apr 9, 2024 · Conversions & Swaps - Dakota Digital issues and solutions for LS swaps - This thread is an info dump for the Dakota Digital gauge issues I've experienced in the numerous installs I've done. I have a summit ready to run distributor with the summit recommended coil. I have read searches until my eyes are crossed & fixed everything I can find. I have had Sniper kits and other various brands of EFI in the past, but this is my first time using the Terminator X. P0335, P0336 tests. Things that we've tried so far -voltage drop test - harness/connector wiring for cam and crank sensors -oscilloscope hooked up and showed both Dec 1, 2021 · While cranking I have no rpm signal, I have dual throttle body set up, it was running fine and all of a sudden it stop starting, key on the pump primes and you here it squirt but no start, the controller stays on, just no signal. Not getting any rpm when cranking. bopms ppij ojshm wuoxt ukmyu rjzcvav doiq xnfr otgbzm baknpvn