I'm having problems with setting the right parameters in my microsquirt for my setup. When attempting to turn the car over it does not want to fire. I have checked the first cylinder TDC in relation to the distributor rotor and that is good. I have had a buddy turn the distributor while I cranked the engine but nothing. We tested for spark and that checks out. It does smell rich from the 80lb injectors dumping all that fuel in the engine with none burning. I know the base tune would typically work for a 302 and 351. My motor is 460 cu in with 80lb Siemen Deka high impedance injectors. I'm knew to tuning and have done some reading and watched videos and even went the route of asking chatgpt to help determine some settings and areas I need to look into. Would someone more knowledgeable take a look at my file to see if there are any mistakes or areas I have not checked out? I have not attempted to create a log since I haven't been able to even get it running rough.
Microsquirt tune for stroked 351W in a foxbody
- Thread starter roldy
- Start date
Are you MAF tuning or Speed Density? The tune is running speed density, so the stored MAF curve is currently unused.
Did you enter injector data specific to the part number on your injectors and have fuel pressure adjusted accordingly?
The tune appears saved in fixed 10° timing mode, so the spark table may currently be bypassed. The trigger type, output polarity, dwell arrangement, and TFI/MSD/coil configuration need to match the actual hardware. I don't think you mentioned the ignition system you're using.
Also:
Make a datalog while cranking and post it. The engine does not need to start for the log to be useful; it will show whether the ECU has stable RPM/sync, sane sensor readings, commanded pulse width, battery voltage, and timing during the no-start.
Did you enter injector data specific to the part number on your injectors and have fuel pressure adjusted accordingly?
The tune appears saved in fixed 10° timing mode, so the spark table may currently be bypassed. The trigger type, output polarity, dwell arrangement, and TFI/MSD/coil configuration need to match the actual hardware. I don't think you mentioned the ignition system you're using.
Also:
Make a datalog while cranking and post it. The engine does not need to start for the log to be useful; it will show whether the ECU has stable RPM/sync, sane sensor readings, commanded pulse width, battery voltage, and timing during the no-start.
I will be using speed density. When I was making adjustments I totally forgot I wasn't using MAF. If you're referring to injector size in the Engine and Sequential Settings I did change that according to the cc/min on the website I purchased them from. For ignition I am using a MSD 6AL with Blaster 3 coil into a MSD distributor. I'll be sure to create a data log. I wasn't too sure with the fixed 10 degrees timing mode.
I don't have an OE Ford distributor. Me and another guy verified base timing but we'll do it again this Saturday. Attached is the data log.
The cranking log shows repeated sync loss (Lost Sync Count reaches 4), and the MAP signal is wildly erratic even with the engine not running. TPS is also sitting around -11.7%.
Before chasing the VE table, I'd sort out the MAP input/calibration and the RPM/trigger sync issue.
Also need to know exactly what distributor/ignition module/coil setup you're using, because the tune is using Fixed Duty dwell.
Before chasing the VE table, I'd sort out the MAP input/calibration and the RPM/trigger sync issue.
Also need to know exactly what distributor/ignition module/coil setup you're using, because the tune is using Fixed Duty dwell.
Distributor is a MSD Pro-Billet EFI part# 8452 with MSD Blaster 3 part# 8223. Ignition module is MSD 6AL part# 6425. I haven’t done any ignition modification. I’ll have to look into the MAP calibration since I didn’t do any of that after the install. I’ll have to read the install directions again with the trigger. I can’t remember if I find and wire the trigger wire into the connector.
Similar threads
