I’m having some start up, idle, and coast down issues. 2005 GTO A4, LS3 480 crate motor (LS Hot Cam), stock converter, headers, UD pulley, 42 lbs injectors, LPE 58x/4x to 24x/1x trigger adapter. On startup it surges up to about 1300 then seeks for a couple of seconds before idling about 900 and during coast down about 1200 gets a surge then settles back down. I was advised to adjust the Airflow Final Minimum up a couple of g/s but then my idle goes high into the 1000 plus range. However, the surging on start up and coast down go mostly away. I could live with the car as is but the wife is very unhappy. I puffed the LS2 and wifey replaced with new LS3 crate, so making her happy is very important.
Everything other then Idle/coast down seems fine. F/A 12.7 -12.8 WOT and conservative timing was 438RWHP/428RWT.
GMPP Hot Cam Specs P/N 88958733 LS Hot Cam I: 219 I: .525 E: 228 E: .525 112 Same cam as in kit P/N 12480033 E: 228 E: .525