Richard:
You say the fault is intermittant and seems to happen when the car is cold ... can you tell me, when you start the car every time, does it usually catch the first time you turn the key?
The 993 is a much different car from the 930, but I had an 1987 930 which became difficult to start; it would usually catch on the second try and once in a while would just die completely. It got to the point where if you keyed the engine 10 times in a row, it would start maybe three or four times. It turned out to be an intermittant grounding problem to the fuel pump relay. When I grounded the fuel pump relay independently, the car started 10 times out of 10 and the stalling disappeared.
I would think if there was an immobilizer problem it would be impossible to get the car to start at all, but ground problems can be a little weirder. But the stalling and hard starting makes me think of the fuel pump.
Vic
88 Carrera
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