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1979 911SC Autocross Misfiring


Vehicle Information: Model: 911 sc; Year: 1979; Body Type: Coupe; Total Mileage: 156000;

I've written to you before on 5/9/02 (running on 3 or 4 cylinders over6000 rpm). Well, I still haven't fixed it nor can the shop I go to figureit out. I've done more road testing and if I go around in a circle atleast twice, skid pad style, really pushing it, when I let off thethrottle it will start missing on a couple of cylinders. The instrumentsare all reading normal. If I continue driving, it usually keeps missingand the temperature starts to rise. If I floor it and let the rpms run upto 5 or 6 thousand rpm, it usually cures itself. Still the best way toget all 6 cylinders running is to shut it down, wait ten seconds thenrestart. The rpm's don't have to be high to make it start missing. Itseems that g-force and lifting the throttle will always make it miss.There is no white or black smoke coming out the exhaust during thisoccurrence. Any more input would be greatly appreciated.

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