Lets try this again...
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Lets try this again...
Ron_C's GF's A4 has been throwing a "System Too Lean" DTC. We did some logging, cleaned the MAF with isopropyl alcohol and did some more logging. Here are the results.
<img src="http://pictureposter.audiworld.com/6924/a4_maf.jpg">
Obviously the MAF cleaning made a difference. However, the O2 Sensor learning values are still out of whack. What is a typical peak value for a MAF sensor in a chipped A4 1.8T?
-Dave Pramanik
<img src="http://pictureposter.audiworld.com/6924/a4_maf.jpg">
Obviously the MAF cleaning made a difference. However, the O2 Sensor learning values are still out of whack. What is a typical peak value for a MAF sensor in a chipped A4 1.8T?
-Dave Pramanik
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I can check when I get home...
but the car is chipped so Bentley numbers might not be that useful. Then again, if Bentley says 150 g/s is normal for stock A4, we'd know that a chipped A4 should be higher than that.
I was hoping someone on the forums had done some MAF logging and could provide some insight.
-Dave Pramanik
I was hoping someone on the forums had done some MAF logging and could provide some insight.
-Dave Pramanik
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Joined: Mar 2001
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Re: Lets try this again...
dont use isopropyl alcohol, not a good idea!
i had the same problem and used componet (electronic) cleaner from fry's, to clean the maf, then cleared the code and it never came back.. try that...hope its not to late since you already used alcohol and might of damaged the maf.
i had the same problem and used componet (electronic) cleaner from fry's, to clean the maf, then cleared the code and it never came back.. try that...hope its not to late since you already used alcohol and might of damaged the maf.
Thread Starter
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Why would isopropyl alcohol damage the MAF?
That seems to be what most people are recommending for MAF cleaning. And it obviously helped since MAF values increased after cleaning.
Electronic cleaner is probably the next step before buying a new MAF, but we REALLY want to know what ideal MAF values are so we know if the MAF is actually bad (and how bad it is).
-Dave Pramanik
Electronic cleaner is probably the next step before buying a new MAF, but we REALLY want to know what ideal MAF values are so we know if the MAF is actually bad (and how bad it is).
-Dave Pramanik
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