Tuning a P59 in a rock crawler. Been fighting with this for some time. Engine is a stock 5.3 with mild-medium cam. 400 Turbo trans and stock converter. Still tuning in speed density mode. MAF disabled, STFT and LTFT disabled, Getting close on the VE table. Tuning with AEM wideband coming through the AC pressure sensor. Torque management disabled.
This issue I'm having is this; when going from park to any gear (R or D) my rpm drop to almost nothing and then surges back to stable. Going from in-gear to park, idle surges up and then stabilizes. Going from R to 3, almost dies and then surges up, lurching the jeep in whatever gear i went into.
I can't for the life of me get this fixed! Can someone take at look at this tune and give me some ideas? Thanks so much for your help!
Crawler Tune LS ECM - 3.7.8.hpt