'87 Subaru GL, fuel delivery My '87 Subaru GL seems to be having a problem with fuel delivery. The pump is working, the filter is new, the gas is good. It will run well for a long time and then out of nowhere it starts to stumble and dies. Then, when it decides to, it starts running just fine again. It's getting spark.

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You say the pump is running and you have spark - but are those working when the engine stops?

Discovering those things is probably the first step towards diagnosing the trouble.

How about the possibility of a foreign object in the fuel tank periodically cutting off the supply? It isn't an unusual thing...

Monitoring the fuel pressure while you drive is one way of discovering the truth.
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