Diablosport Forums

Hello everyone,

I have an 04 gto, CAI, LTH, Flowmaster dual exhaust with cats, o2 before and after the cats.
I installed the canned gto tune. I have 2 questions. First question is my bank 1 ltft at 2200rpm is 11% my bank 2 Ltft is 8%, I adjust my slope -11% or do I average the two banks together then adjust the -% because there both positive?

Second I can't get my car to idle correctly. After driving on the freeway for 20 minutes when I get off the freeway and come to a complete stop its idling at 1500rpm. Can the ltft effect my idle speed?

Im attaching my last log

Average the trims for starters then log again, but IMO, you need a custom tune to dial in the LTs properly.

None of those mods should lead to idle issues unless the CAI alters the MAF housing/location quite a bit.