Date: Fri, 09 Jun 2006 09:50:07 -0400 From: cs <cobsnospamnet> Subject: Re: fun AMM anecdote
Probably a dirty contact, that you temporarily fixed by re-plugging - I'd leave it alone as it's working, but if it acts up again, unplug it, clean the contacts, apply some dielectric grease, and plug it back in. cs On 08 Jun 2006 22:51:35 GMT, John B <rotten_NOSPAM_nospam.org> wrote: >Here's an interesting story regarding a recent experience with the air mass >meter in my 1992 900S: For about the last year, I experienced intermittent >Check Engine Lights (maybe once a month or two, at first). The frequency >gradually increased, until I was seeing the C.E.L. pretty much every day. At >the same time, the car's idle became rougher and rougher, and it nearly stalled >a few times. All of the stored error codes had something to do with the mixture >being too lean (e.g. bad mixture, lean mixture, oxygen sensor, etc). > >I suspected it might be the AMM. I read a post in this group that suggested >that unplugging the AMM could be diagnostic (i.e. if unplugging it improves >performace, the AMM must be the problem). And so I unplugged the AMM, and >quickly discovered that the car won't start with the AMM unplugged. >Disappointed, I plugged it back in and drove off. > >To my amazement, the Check Engine Light and drivability problems were totally >cured, and have remained so. I don't know why it worked, maybe the plug was >gradually coming loose from the AMM? Anyway, this was the cheapest, fastest, >and easiest car repair job I have ever done. > >John
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