Hi Ian,

Have you made any progress with your problems? I am having similar issues myself with a 92 400E with ASR. Runs great when cold, but after driving around for a while and reaching 80C+, it does not want to start back up after being shut off. If I wait about 15-20 minutes, it will start back up and stumble along and eventually run a bit better, but still poor. Next morning, starts like a dream and then repeat.

In the past, I have replaced the engine harness, temp sensors, caps/rotors/plus/wires. To rectify my issue I have tried replacing the fuel pressure regulator, crank sensor, and now just sent out a spare throttle actuator I had to be rebuilt just in case.