whats causing ltft to shoot up at idle?
10-05-2007, 05:46 PM
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whats causing ltft to shoot up at idle? Car all of a sudden went rich at idle, scanned it today and it showed the fuel trims rising as high as 36 at idle! I am kinda new to this so where should I start? maf was reading 2900 & 10.00gm/sec mapkpa=72 volt 3.30 iac pos=60-80.
This was off a snap on scanner.
This was off a snap on scanner.
10-16-2007, 05:53 PM
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If the trims creep continuously over a span of many seconds,
to minutes, at idle this may be O2 sensor cooling related. If
it just steps into a lousy looking LTFT and stays put, that's
an airflow or fuel delivery inaccuracy.
Creep, or crappy from the get-go?
to minutes, at idle this may be O2 sensor cooling related. If
it just steps into a lousy looking LTFT and stays put, that's
an airflow or fuel delivery inaccuracy.
Creep, or crappy from the get-go?
10-16-2007, 07:22 PM
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THe cam is a ms3 so kinda big, the trims creep up slowly, the car starts fine and idles fine right away and the longer you let it idle the worse it gets. I watched the fuel trims climb and climb. Could this be caused from running leaded race fuel? Could I have fouled the 02's?
