Re: Ummm MAF? What is that? - Saab 9-5 Bulletin Board - Saabnet.com
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Re: Ummm MAF? What is that?
Posted by John Myers (more from John Myers) on Thu, 9 Sep 2010 14:36:30
In Reply to: Ummm MAF? What is that?, EricG, Wed, 8 Sep 2010 21:30:11
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It is something to worry about on OG9-3s and older 9-5s. The Mass AirFlow sensor can fail in such a way that it runs the engine lean and overheats the pistons to the point of ruin. There is often no CEL (check engine light) and the only warning is loud pinging.
I had a case where a certain used car dealer paid me to replace an engine with a used one but refused to pay for the new MAF. It took about 18 months, but the car came back with the same piston damage. The second used engine has been fine for about 3 years now with a new MAF.
I have been using MAF cleaner spray on my customers cars for a couple months now. I don't know if it helps, but it gives me a feeling of trying to do the right thing.
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