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Maxx1 Maxx1 is offline
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Join Date: Jun 2007
Location: Oh
Posts: 460
Well, this is all just bumming me out. I just got back from another test drive and this is a very intermittant problem.

I drove the car around until the oil temp got up to 180 - 185. The car ran perfect. With the motor fully hot, idle was smooth as could be, 800 rpm at every stop, it would not vary or faulter. Finally after about 1/2 hour of stop and go driving at operating temp, I pulled up to a stop sign and the idle dropped to 200 rpm, then up to 1,200 rpm ( up and down within a few seconds ) then it died. It did it once more as I pulled in my drive. I sat in front of the garage and it was at a smooth 800 rpm. I let it idle for about 5 minutes blipping the throttle now and then.... but it remained a perfect idle.

If this was a mixture problem, I am wondering why it would run perfect 90% of the time? Seems to me there is some valve or regulator sticking or intermittantly failing on me rather than a constant such as a bad mixture... don't you think?
You guys are the experts, but I am trying to logically think this out from my past experience.

Here are some other details;

I did pull a few plugs and they are dark, but not sooty... so yes it is on the rich side at idle.

Whenever I blip the throttle, there is a clicking sound from the motor, but I am not sure where it's coming from?

The car quietly pops and burbles trailing throttle (while shifting gears)... is that normal?

For whatever it's worth, I tried about 50 times to get the car to die by pushing the clutch in and coasting while under way, but it always settled down to a nice 800 rpm idle. It only seems to die when I am stopping or turning.

At any rate, thanks for your suggestions, I am learning a lot about the fuel system so it's all good. ... intermittant problems are the hardest to figure out sometimes.
82 Porsche 930 Euro, black, 31K miles.
Factory stock other than k27 turbo, B&B headers, GHL exhaust, Tial F40, 1 bar wastegate, MSD 6A ignition, 8" and 9" Fuch upgrade, H4 Xenon headlamps and a 930S steering wheel.
Old 07-05-2007, 12:31 PM
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