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Did you ever get this figured out? Im trying to do the exact same thing on my car. I have my Fuel level sending unit wired into ECU and reading Percentage data on PC link, but i'm trying to figure out the CAN programming side of things. Thanks

Hi everyone! Been having a weird issue on my setup for a while. Every other time I try and start my car, it will crank extra long and produce a loud backfire out the exhaust! (Cops aren't very happy haha) If i attempt to crank again, it usually starts right up and runs amazing once it does start! Before anyone asks. Yes the timing is syncd, and yes all of ignition, ve, crank enrich, dwell tables are setup correctly! Car runs mint! It seems like the coils are firing far away from TDC when this happens! I have not had a chance to get a trigger log, but I can get one if someone wants to take a look. I believe this issue has something to do with the new "Sync tooth" setting on the G4x's as the G4+'s don't have that setting and i've never had an issue with a G4+ Just a thought. I'm using all of the M50 Basemap trigger settings (Other than the Trigger offset), which i have properly syncd on my car. Curious why this new "Sync Tooth" setting was added. I was under the impression that the Cam sensor was in charge of Cam Sync on these ECUs Also Id like to add that Ive had this same issue on other M50 Plug in G4x ECUs on Customer cars. Any sort of help to resolving this issue would be great! Thanks

Was there a recall for the out of spec FETs? Can I send my ecu in to get checked? I’d love to figure this out

Thanks for all your help! Im from San Francisco, California

Good to know. I took a few logs of battery voltage. 1 at 50hz, and another at 100hz. Looks like the ecu Measured voltage isn't dropping below 10volts. Where does the logger get its voltage reading? Same place as the Main relay MOSFET? So if the ECU is only getting 10v, then so is the MOSFET? I'm basically running a stock M50 In an E30 with a stock rear battery. Cranking bat voltage 50hz.llg batt voltage log 100hz.llg

So I checked the voltage between pin 55&56 and I saw the voltage dropping to around 9.5volts initially, then jump up to 10+ volts. I tried 2 different multi-meters and they both registered pretty slowly. The voltage could be dropping alot lower for a instance, causing the MOSFET to drop out. All of my grounds are super solid. Is there any easy way for me to test the MOSFET in the ECU without breaking open the ECU? Or would i have to send in my ECU to get checked. Heres a trigger scope.

Ok. Ill try this and report back. This makes sense. It still seems to take longer than it should. One last question, do these ECUs supply spark before syncronization? If so, the pre-crank prime settings should help me get a quicker startup. I haven't had much sucess using pre crank prime and getting a smooth startup so I turned it off. Long crank main relay manually triggered..llg M52 NA 4 door Daily.pclr

Hi Adam, So I tried grounding the main relay manually and I got the ecu to stay connected during cranking. If there is a permanent wiring solution to fix this, that would be great. Still curious why the ECU takes so long to sync the triggers. Based on this log, I noticed that fueling doesn't start until the ecu sees RPM. As soon as fueling starts, the car starts instantly. Is there any way to reprogram the ECU to start fueling as soon as a signal from Trigger 1 is present? I would love to get a quick, OEM like startup from my car, much like the stock ECU. Thanks for all of your help everyone!

That fixed it. Thanks

Logging was set to full time for this log. My car consistently takes this long to start.

Sorry for an off topic thread, but I think i've found a glitch in your website. Every time I login here, I have to reset my password. This is a little annoying Just wanted to bring this to your attention. Thanks

Based on this ECU log, I don't see any voltage drops before the engine has started. However, I cant display a cranking area on the log. The very begining of the log is me turning on the ignition and waiting a few seconds for my Computer to connect to the ECU. It looks like my car starts up instantly on this log, but it actually cranks for about 2 seconds before starting up every time. The main reason i'm trying to fix this communication problem is so I can figure out why this thing takes so long to start up. As soon as the ECU syncs the triggers, it starts up instantly. What i'm really trying to figure out is if my long cranking issue is caused by the Triggers not syncing right away or maybe my ECU is losing power for a moment. My main relay gets power directly from the battery in the trunk with a seperate wire. Not on the starter post. long trigger sync log.llg

Hi everyone, i noticed that during cranking, the USB connection between my ECU and laptop is lost. It reconnects in a couple seconds if I have Auto connect on. Just curious why this happens. Is the USB connection somehow wired into the unloader relay circuit? Not a huge deal, but it’s a little annoying trying to log cranking and post start parameters. I have an M50 in my e30 running a G4+ PNP. Thanks

Oh really? I was under the impression that Hall sensors are superior in every way. Hm. Im running the M50 Hall cam sensor which is currently working really well for me. I never actually had a trigger error. In fact my car is actually running really well! I was just having issues calibrating the crank trigger. The untouched M50 PNP trigger settings showed 30degrees BTDC on my timing light at idle and drifted to around 90degrees BTDC when free revving to 4000-5000rpm. I changed the trigger offset on PC Link and was able to get the idle timing to about 0 degrees on the timing light. The car still ran, just felt very sluggish and felt like it was lacking timing. It built boost really easily free-revving and lost a good amount of throttle response. Is it possible that I have a bad timing light? Im using a Centech harbor freight one and clipped the lead around the green wire on my Cylinder 1 Coil pack. Ill post a trigger scope later today!

So, for wiring in a Hall crank sensor onto an M50 harness. The M50 ECU Plug has 2pins for the VR crank sensor. Pin 16 is Crank sensor + Signal and Pin 43 is Crank sensor - Signal For a 3 wire Hall sensor, Do I just supply 5v and ground to common sensor supply wires and send the Hall signal through Pin 16 on the ECU Plug and leave Pin 43 Alone? Also planning on using shield cable and grounding the ECU end of the wire to a common shield ground pin. Sound correct?