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The Terminator
Terminator Talk
Normal STFT high LTFT
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<blockquote data-quote="efnfast" data-source="post: 17019670" data-attributes="member: 104733"><p>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%.</p><p></p><p>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%).</p><p></p><p>Car drives and idles fine and no check engine lights or anything unusual. Original O2s with around 275k on them.</p><p></p><p>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?</p><p></p><p>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</p><p></p><p>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?</p></blockquote><p></p>
[QUOTE="efnfast, post: 17019670, member: 104733"] 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? [/QUOTE]
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Normal STFT high LTFT
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