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My friend has an 02'.......

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Old 09-04-2004, 01:32 PM
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Default My friend has an 02'.......

Its got an APR chip, Forge BPV's, and he just put on the Neuspeed exhaust. The CEL is coming up, I vaged it and it says he is running lean. Any Suggestions? Maybe Fuel Pump, injectors, MAF? TIA
Old 09-04-2004, 01:46 PM
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Default log block 003 and let us know the max airflow shown.

My guess would be the MAF is dying, but it could be a number of things.

edit: monitor O2 voltages and make sure you don't blow your engine...
Old 09-04-2004, 01:48 PM
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Default Also, log block 115

do this during a 2nd or third gear run going wide open throttle to redline (and don't get caught doing it).
Old 09-04-2004, 02:07 PM
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Default maf. same thing happened to my dads 00.

left bank running lean. maf readings didnt go over 110.
Old 09-04-2004, 02:57 PM
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Recommending WOT runs when throwing lean codes can't be good.....
Old 09-04-2004, 02:58 PM
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Default I've never heard of a Hitachi MAF failing, only Bosch. *EDIT*

*EDIT* I just searched the archives and apparently a few Hitachi MAFs have failed. With that said, it is still extraorindarily rare.
Old 09-04-2004, 05:01 PM
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I think Jonas had one last week. Bad idle fluctuations with no other obvious symptoms.
Old 09-04-2004, 06:29 PM
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They fail too. Don't know if it is just as frequent or we don't complain like the A box guys =-)
Old 09-04-2004, 06:33 PM
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I never hear about them. I hear about Bosch's dying left and right.
Old 09-04-2004, 06:35 PM
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Welp, my 10/00 S4 lost one, and I didn't complain or probably even post it.... so there!


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