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Fuel trims
- Vincent valentine
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1 year 8 months ago #64606
by Vincent valentine
Fuel trims was created by Vincent valentine
Hi everyone
I Have a Suzuki grand vitara ( it was a chevy tracker in the states) 2 liters 1999 but i dont think that matters much. That being said, i was checking the fuel trims the other day and at idle they were fine +-3% but once i step on the pedal they go negative quite a lot (-10/-15).
Went for a drive and at WOT trims were 0 but as soon as i step out of it they went negative. Any idea what could cause it?
Yellow line is throtle
Red line is long fuel trim
Blue line is rpm
I Have a Suzuki grand vitara ( it was a chevy tracker in the states) 2 liters 1999 but i dont think that matters much. That being said, i was checking the fuel trims the other day and at idle they were fine +-3% but once i step on the pedal they go negative quite a lot (-10/-15).
Went for a drive and at WOT trims were 0 but as soon as i step out of it they went negative. Any idea what could cause it?
Yellow line is throtle
Red line is long fuel trim
Blue line is rpm
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- Noah
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- Vincent valentine
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1 year 8 months ago #64609
by Vincent valentine
Replied by Vincent valentine on topic Fuel trims
Was checking the trims and they are all mostly negative
What bothers me is why at WOT trims are 0 and everywhere else except at idle are quite negative.
Blue line is short trim
Yellow line is long trim
Red line is the sum of both
Red line goes from 0 to -20
What bothers me is why at WOT trims are 0 and everywhere else except at idle are quite negative.
Blue line is short trim
Yellow line is long trim
Red line is the sum of both
Red line goes from 0 to -20
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- bills4065
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- Vincent valentine
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- Vincent valentine
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1 year 8 months ago #64615
by Vincent valentine
Replied by Vincent valentine on topic Fuel trims
Yes it's in the return line
And you mean to check if there's no fuel on the vacuum hose? If thats the case there's not
And you mean to check if there's no fuel on the vacuum hose? If thats the case there's not
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- Vincent valentine
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- Vincent valentine
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