At idle and driving my STFT seem about right - they range from +/- 5%. Every once in a while when stopped for a while it creeps up to +15%, but most times remain in +/- 5%.
At idle my LTFT is 25%. If I give it moderate throttle (quarter to half) and go 1 through 4, LTFT drops to around +2-3%. If I hold it around 3k rpm in 4th it remains around +2-3%. If I shift into 6th and cruise around they rise to around 20% (even though STFT is staying around +/- 5%).
Car drives and idles fine and no check engine lights or anything unusual. Original O2s with around 275k on them.
Does that seem like a vacuum leak? Or should I parts cannon O2s and a new MAF at it (O2 voltages look normal to me)? Or something else?
edit: the reason I'm logging O2s is because 1,000 miles ago while idling it threw a CEL that was 'lean bank 2'; I reset it and it never came back, so I imagine what happened is the LTFT was 25% and maybe my STFT popped up to 25% too very briefly
edit 2: my evap system has an issue - likely clogged charcoal cannister - because I can only put in like 0.1 gallon of gas at a time before the pump clicks off (so I have to fill stop fill stop fill stop fill stop, etc.), but I don't think that would cause this?
At idle my LTFT is 25%. If I give it moderate throttle (quarter to half) and go 1 through 4, LTFT drops to around +2-3%. If I hold it around 3k rpm in 4th it remains around +2-3%. If I shift into 6th and cruise around they rise to around 20% (even though STFT is staying around +/- 5%).
Car drives and idles fine and no check engine lights or anything unusual. Original O2s with around 275k on them.
Does that seem like a vacuum leak? Or should I parts cannon O2s and a new MAF at it (O2 voltages look normal to me)? Or something else?
edit: the reason I'm logging O2s is because 1,000 miles ago while idling it threw a CEL that was 'lean bank 2'; I reset it and it never came back, so I imagine what happened is the LTFT was 25% and maybe my STFT popped up to 25% too very briefly
edit 2: my evap system has an issue - likely clogged charcoal cannister - because I can only put in like 0.1 gallon of gas at a time before the pump clicks off (so I have to fill stop fill stop fill stop fill stop, etc.), but I don't think that would cause this?
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