[JRuderman]

1987 Porsche 924s
65k - Excellent Condition

History: This car had a oil cooler leak which dumped oil into the cooling system. The car overheated. Head gasket blew. Repair: Replace thermostat, radiator, oil cooler, resurface head, and various hoses. Serviced by Porsche specialist.

Symptom: Car either hesitates (bucking) or will stall when driving for the first 10 miles or so when ice cold. Problem occurs randomly when cold, not everyday. Problem does not occur when car is warm. Car performs great when warm.

Troubleshooting to date: Replaced DME relay, swapped out DME ECU, swapped out Air Flow Meter, tested reference sensors, tested fuel output. Extensive vacuum testing revealed no leaks.

The odd thing about this problem is it started to occur after the head job was done. It appears to be temperature related. The problem occurs usually when it is cold outside and car has been sitting overnight.

Any ideas?

Thanks,

Jordan