I've been beating my head against the wall on this one for too long. I'm running an E40 with a 416 LS3 with a ton of work done to it but I cannot get this thing to idle decent for the life of me. I cannot get it to start without giving it gobs of throttle, it stalls and surges all the time in and out of gear. I attached the tune and the idle log file.
The engine came out of a 6-spd GTO I bought awhile ago and it's now in my off road car with a turbo 400 behind it. I'm running this as speed density with no O2 sensors, it runs great from about 2500 rpm up. I attached the tune and the log file.
Engine specs:
416" LS3 with 11.8:1 compression
Ported TF 225 heads
Port matched Fast 102 intake and DBW 102mm nick williams throttle body
FTI Hellion Cam - 244* - 248* - 112* - .631" - .631"
Thank you for your help!