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1990 964 C2 Idle problems Update

Engine

Vehicle Information: Model: 911; Year: 1990; Body Type: Cabriolet; Total Mileage: 41000;

Dear Joel.I would like to submit an update to the problem I had with Idling. It is kind of educational.The problem got so bad that I got fed up, and looking at it, I realized that the only thing left was the performance chip and the Autothority MFI. The guy I bought the car from gave me the original parts and original chip. So I did reverse engineering and restored the car to stock. And guess what! The car runs like a dream. I did some spirited testing and I really do not know if I can detect some difference in performance. It is certainly a lot easier to drive. An interesting side effect is that the oil level came up a bit. I was running at about 1/4 tank and it jumped up to a bit more than half. I attribute that to difference in backpressure in the throttle body.

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