my bad MAF plot and the DTC's which lead to the logging...

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09-02-2003, 10:35 AM

TRM

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my bad MAF plot and the DTC's which lead to the logging...

during the track event Tomasz (it's spelled correctly) pulled these with his VAG:

17538 - Fuel Trim: Bank 2 (Mult): System too Lean
P1130 - 35-00 - -
17536 - Fuel Trim: Bank 1 (Mult): System too Lean
P1128 - 35-00 - -

Which lead us to log this:

2 runs on the same chart. note i had to lift due to a road way obstruction on the 2nd run (on right side of graphs)...

<img src="http://www.velozt.com/elements/tech/logs/MAF-log.jpg">

and boost...
<img src="http://www.velozt.com/elements/tech/logs/boost-log.jpg">

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09-02-2003, 11:37 AM

JBear::FATS

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I have the exact opposite, intermittent problem. Too rich on both banks. No other DTC's.

Pressure tested OK. BPV's replaced. Replacing the N75 valve (since I've adjusted it), then the MAF, followed by the FPR.

I believe the too lean codes without any pressure deviations is usually the MAF.

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09-02-2003, 06:08 PM

zapco98

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Did you change your coolant temp sensor?

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09-02-2003, 08:44 PM

JBear::FATS

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Twice. I have no idea what to do next. Any advice would be appreciated.

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09-03-2003, 02:35 AM

TRM

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i swapped in a good MAF and still limp mode...i'm clueless also.

time to STFA for more info.

i hate being the guy who comes up with the impossible problems to fix. it was the same thing with my 300ZX TT although i had far fewer issues with that car than the S4.

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