Just got back from a trip to the mountains in my '87 Westy, on the back of a AAA transporter....
The trip up yesterday went perfectly. Coming back down California Highway 4 today, after driving 40 miles, the engine just lost power and died about 30s later. It would start up again after a minute or two rest, run for perhaps a minute and then loose power again, run very rough & die.
My attempts to diagnose the problem failed me (hence the AAA transporter);
- Tried changing the ecu (I had a spare) - exactly the same. Waited for 15 minutes for engine to cool down and tried again; exactly the same. Took a plug out - nice and clean. Engine compartment was dry and electrical leads & coil seemed fine (although it had been raining). Couldn't hear if the fuel pump was runing (too noisy alongside the highway).

Now the van is in my driveway, I'm planning my campaign to find the problem. My first thought is this is a fuel starvation problem, so I will�check/replace the fuel filter and fuel pump (& check there is no obstruction at the gas tank).

Do you think I'm on the right track or do you have better suggestions?

Thanks,
Mike
'87 Westy
SF Bay Area