Parts I've replaced so far:

- crank position sensor(new)
- coolant temperature sensor(the 4-pin, new)
- auxiliary temperature sensor(the 2-pin, new)
- cold start valve(new)
- fuel pressure regulator(fpr), fuel pump and filters and the fuel accumulator are about 5-6 years old - no leaks here
- fuel injectors are about 4-5 years old - no leaks
- EHA no leak (original) - idle control valve (3-4 yrs old) - tested with spare, no change

- OVP works - tried spare but no change

- Ignition coils, plugs, caps, rotors all new

Fuel pump works well even when the pins 1-2 bridge. Fuel pressure is good, no leaks as far as I know.

I had a similar problem with my '88. It was intermittent, but got worse with time. I ran a simple on-the car-test and found that the fuel accumulator had an internal leak, which means it wouldn't hold pressure. Fuel just short circuited back into the hose from the fuel tank. With a new Bosch accumulator, starting behavior retuned to normal.

I documented the test along with a destructive failure analysis of the accumulator that clearly showed the internal diaphragm was cracked. Search for threads started by me and consider running the simple fuel accumulator test even though it's not that old.

Duke