Long term fuel trim @ 17-21 - Vac leak? short term at -4 to +4

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Apr 7, 2008 | 03:14 PM

JettaTT Love Child

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Long term fuel trim @ 17-21 - Vac leak? short term at -4 to +4

So I had not used the LTF or STF gauges on my scangauge yet and today I looked at them and it seems like my LTF was too high- am I right?

Apr 7, 2008 | 03:22 PM

TTinCT

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yeah....looks high>>>>>

you may need to escalate the problem to VAG....check your g/sec.....could be a MAF or O2 sensor going bad...

Apr 7, 2008 | 03:26 PM

TTschwing

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You're about to go limp....>>

Usually does it at +22

Probably a MAF....Unplug it and see if it runs better (you'll get a CEL...Don't worry about it)

Apr 7, 2008 | 03:33 PM

JettaTT Love Child

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This definately caused my recent CEL - P1128 Long Term Fuel Trim mult.,Bank1 System too Lean

Too lean at idle would be a maf problem?

Apr 7, 2008 | 04:05 PM

MarTT

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More than you want to know about fuel trim . . . explains it all:

Apr 7, 2008 | 04:17 PM

TTschwing

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On the scangauge LTF = Multiplicative or Partial throttle...(long term Fuel trim)

Apr 7, 2008 | 04:27 PM

JettaTT Love Child

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I thought STF was the multiplicative and LTF was the Additive

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Apr 7, 2008 | 04:51 PM

BlueChip

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From: Madison, AL

You mean E.D.

Apr 7, 2008 | 05:41 PM

#10

SpongeBobTT

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Speaking from experience?

There's a joke here somewhere...

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Long term fuel trim @ 17-21 - Vac leak? short term at -4 to +4

Long term fuel trim @ 17-21 - Vac leak? short term at -4 to +4

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