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Another problem solved by Renntech, CEL and AOS

Recommended Posts

CEL came on this week with codes p1128 and p1130, and also noticed that the engine was squealing while idling after having warmed up (giving it throttle made the squeal go away). As I'm not particularly mechanically inclined, one of the first things I did was start searching the boards here, and found several threads on these topics. So today I cleaned the MAF (it didn't look dirty at all) and throttle body (slight buildup), then checked to see if there was a vacuum leak by trying to take off the oil cap with the engine running. I couldn't get the cap off. A lot of threads pointed to a bad AOS as a primary cause of vacuum leaks. The car is at 64K and it seems like a lot of AOSs fail around this time. So I called up the local Porsche dealer, and they had the AOS in stock ($108) and I was able to get it the same day and put it in, thanks to Mike Focke's excellent DIY. No suction at the oil filler now, and haven't heard any squealing yet, so it looks like that was the problem. Just in time for autocross tomorrow too!:drive:

So I said all that to say thanks to the Renntech community for all of the great information! It helped me diagnose and solve a scary (for me) problem quickly. I would have probably spent 4 or 5 times as much taking it to a mechanic for diagnosis and installation, and it could've taken a lot longer to get fixed. A few good searches of this board can really be productive!


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