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I checked the MAF readings at idle and they appeared to be "normal". It was confusing because I wasn't getting any MAF codes so I thought it had to be air leaks or fuel pressure problems. Finally I got frustrated and bought the MAF even though I didn't think it was the problem. At that point I was willing to spend $300 just to rule it out but I was totally surprised when all the adaptation numbers immediately went to almost perfect values. By that time I had recorded the adaptation numbers about 6 times so I knew the pattern and could see a huge change for the better. The CEL hasn't come back in almost 2,000 miles. My case might not be typical but it seems like MAF problems don't always generate MAF codes and a MAF can be bad even if seems to have normal readings. The Durametric paid off for me. Without it I wouldn't know that the data values had changed/improved.
I'm not saying you should buy a MAF because your readings are backward from mine. You could well have intake leaks since your car shows lean at idle.
Last edited by Dale_K; 06-10-2011 at 01:47 PM..
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