These symptoms match those of an unplugged AFM.

On 11/2/08, Michael Hart <mjhart853@yahoo.com> wrote:
> 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
>
>
>
>

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Chris S.
Disclaimer: "Death and serious injury may occur"