Hey guys, I have an issue that has stumped me all weekend. I am working on a 2002 Z06 with a 414 LS3 based stroker, 12:1 cr, LS3 heads, GM LS3 hot cam, LS7 injectors, LS2 90mm TB, LS3 MAF, 24x/1x 411 PCM.
I have the MAF disabled, that's a whole other issue. I am in speed density with the MAF failed and LTFT's off. I started with the Z06 base cal, inserted LS7 injector data, edited displacement and bumped up the idle speed. I cannot get the engine to stay running, it will fire and idle at commanded speed for about 5 seconds then just dies. I have resolved issues like this before with RAF tuning but I cannot keep this thing running long enough to log any data. I have turned the RAF up slowly all the way 4 lbs/m and made no progress. I also have messed with the VE table a lot, to no success.
When the engine is about to die, I cannot recover it with throttle input, it just dies. My LM-2 is a POS and has not cooperated with me at all on this job, so I have not AFR data to share.
Any help would be great. This job has so many mechanical variables, I don't know if im fighting the tune or a incompatibility with hardware