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waazzupdude waazzupdude is offline
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Join Date: May 2015
Posts: 17
Porsche Crest Porsche 911 while driving suddenly high idle ~3000rpm

Hello everyone,
I had just recently purchased a 1981 Porsche 911 SC Targa that has been non-operational for three years and had not been driven by the previous owner. It started up great and I noticed the oil needed changing so I turned it on to heat it up but also noticed that the car had no gas so I drove it a mile to the nearest gas station to get it filled.

In that drive, it was running great but suddenly the rpm became stuck at 3000 rpm. When I accelerate it would accelerate above 3000 rpm with no hicups but when I let go of the accelerator it goes back and stays at 3000 rpm.

I put gas in it and restarted the car and it still had the same problem. Keep in mind that when I had been turning on the engine in the garage for short periods of time it did not have this problem.

When I got home I removed the oil and I am waiting on parts to fix some leaks so I have not turned it on since.

I am thinking that since this car had not been driven in a long time, something got stuck. Is it possibly the auxiliary air valve (AAV) or auxiliary air regulator (AAR) is stuck? Could someone also help me figure this out?, which one is the one that is on the right side of the engine under the airbox. Or could it be a clogged fuel filter or fuel injector? The fuel filter seems new though.

I went ahead and tried to remove the what I think is the AAV to run some tests but I got stuck because after I removed the two hoses and the electrical connection it still seems to be held on.

If someone can direct me to a course of action or how to remove the AAV I would much appreciate. I am new to porsches so I need some help! Thanks
Old 05-31-2015, 11:14 AM
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