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04-02-2012
I have two log files with the LTFT up to 16.4 and as low as -20. Is an untuned car really this far off or do I have another problem? (Vacuum leak?, exhaust leak?) I've replaced all the vacuum lines and went through a can and a half of carb + choke cleaner looking for leaks and came up with nothing. The bolt holding the EGR tube to the LIM was loose but tightening that did nothing for my LTFT.
Log File 1
Log File 2
04-02-2012
Untuned? With what mods?
The only thing that "requires" a tune is a huge cam (huge), or different maf/throttle body / injectors.
04-02-2012
Ported rear manifold(had a powerlog till it rusted out) Racetronix fuel pump, 180 t-stat, U-bend delete, Spectra Filter. Not much to help with airflow so I'm assuming its normal, just never noticed it. Just don't want to try to tune out something I should fix.
04-02-2012
so, stock.
LTFT should be around +-3 on a stock car at cruise/wide open. Idle/decel things may get weird but its probably not a big deal.
04-03-2012
Pull that EGR tube off and look for the crack in it where it meets the LIM. It's usually there.
04-03-2012
That was it. Small crack but was enough to mess with my fuel trims. Thank you.
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