Leaning out on tip in throttle.

[Slowhawk]

Car is sig. Recent changes are 3.5 Mass air,Extender chip,Translater. BLM's are 124-130 and on my wideband it will go to 17-1 A/F on tip in and sometimes backfire through the intake.Cruise and WOT are fine.

FP-45psi
TPS .44

Thanks for any responses

 

[bruce]

Try a notch richer on the idle mixture setting.

Might be time to run a bottle of good injector cleaner though it, use just the GM, or Berryman's cleaners, thou.

 

[Slowhawk]

The injectors have about 500 miles on them.This also started after the current mods were done.The stock MA and reg extender chip had no tip in problems.