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Won't start

Electrical

Vehicle Information: Year: 1988; Engine (Size, Modifications): stock 930; Total Mileage: 69000;

I was recently trapped in Michigan highway construction stop and go for over an hour in 80+ degree weather. The 930 survived that but when we started booking down the freeway post construction, the engine suddenly lost power without warning. As I pulled over to the side of the freeway, I noticed a puff of white smoke rising from the rear deck. The engine had now stalled. I cranked it over and it fired right up. I drove for another mile or so and it happened again. I pulled over, cranked it and it fired up again, I got off at the next ramp and it stalled at the light, this time it wouldn't fire up. I pushed the car to a parking lot, had dinner at taco bell to let the car cool off. Came out, the car started up and we survived the 15+ miles city driving home since I was reluctant to stay on the freeway. A week later, I'm getting ready to go to the Porsche club summer picnic and the car won't start. The engine cranks very strongly but it won't fire. I started checking fuses and all seem ok. I turn the key to engine on and I hear the high pitch sound from the left side of the engine compartment near the fuel filter but I don't hear any fuel pumps. Having previously owned a Fiat, I start tapping on the relays and jiggling wires (works with Fiat's) and when I wiggled the "yellow" relay, I heard what I believe are the fuel pumps, I try to crank it over, it still won't fire. I took the relay down to the Porsche dealer who told me it was a $300 flasher relay and did I really want to get a new one. I passed on that (but I also know it is not a flasher relay since my flashers work fine without it). I plugged the relay back in and no amount of jiggling seems to get the pumps going. Before I have the car towed away for service, any advice? Sorry about the long winded explanation.Thanks.Eric

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