Sup,
So I've got two GP's, one whom I'm swapping out an XP cam in, that's my daily. But that's unrelated.
The issue I'm having is one I've been having since a year now, it's on my '00 GT with an l67 swapped in.
So now on to explain, it's about LTFT.
Idling ; Between -7.0% and 0.0%, same in Park/Drive/Neutral.
WOT ; usually close to 0.0%, never in the +, more often in the - when it does.
Accelerating ; Usually between 3.0% and -10%
Coasting down without touching the pedal ; -7.0%
Those are all acceptable, I think, but the issue is when I am on cruise control, or keeping my speed, let say highway driving it'll stay in a okay range, then suddenly will creep up to +16.4%, and will stay pegged there till I hit a hill, coast down or give it gas, where it will go back down and stay there till it repeats this.
Now on what I've done so far is drench the engine in carb cleaner a few times, trying to find a vacuum leak, but never found anything. Now on to a gauge, vacuum coasting down is about 24.3in/hg, and idling warm, around 20 and steady.
I'm a bit puzzled. And I'm wondering, if I don't pay attention for like, a few minutes with it pegged at 16.4%, will it harm the engine? (Fact is I want to sell this car ASAP after I'm done with my XP cam build on my daily.)
Thanks for the input.
