Why my 87 Jeep stalls when hot, but engine not overheating?

"I have an 87 4.0 auto 4x4 inline 6. It will start cold near no
problem but after a few miles in hot temp or 20 minutes of driving will
stall or not start again until the engine have cooled some. I had a
mechanic look at it (small town) and suggested any ignition coil, module or
pick-up coil. I tested the ignition coil and it passed all ohm test
but not sure if looking at replacing the entire distributor is the
correct way of thinking or if near is some other problem here. The engine
temp is fine and so is the fuel pump (already tested)."


Answers:    It usually is the distributor either the pick up coil or module that cause this no start when hot, If you have the selection and the price is right then transform the entire distributor.
Next time it dies, check for spark. That may not be the problem.

If the fuel line get too hot, todays newer gas tends to boil easier than gas from a few years ago. (alcohol within it)

You may want to wrap any steel fuel lines that go ancient the exhaust manifold to insulate them from the roast.

Just one option.......?
First, metamorphosis the water heat sensor, it might be shot and giving false readings.
Look into the possible vapor lock surrounded by the carb, or throttle body, also make sure the gas bonnet is proper and not a tight sealing radiator hat.
.
Ignition coils can also give a devout reading, yet go amiss when hot.
Replace the distributor? no, usually not necessary and too costly, plus they don;t turn bad merely when hot.
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