1986 Ford F-150 stalls after driving on a hot day

See my profile, I am familiar w/ '86 T-Bird, If you are throttle body injected. When this occurs again, if at all possible have a can of starter fuid and an "inline spark tester" handy (or do the old fashion way)

Shoot a shot of starter fliud in throttle body----see if it at least "WANTS" (or does) to fire up (A FUEL DEPRIVATION PROBLEM)

AND/OR

Test for spark (IGNITION PROBLEM)

Come back with results

Love, Turddog

Do you have fuel pressure during hiccup?

Can you hear the fuel pump come on (if real quiet, maybe have someone actvate key several times while you listen at open fuel cap)

If you do not hear it, maybe "THUMP" the Fuel Pump Relay(s)---may be more than one--See if it/they start the pump into working. Do one at a time, you may locate the one that is causing the problem. Without Mega testing or unnecessary replacment.

A self serve salvage yard may supply you several "extra" relays/stuff to test with (all Fords may possess same stuff in similar years). Many times I can walk out with a lot of nothing stuff for less than $5.

You can always replace with NEW, once located.

Respond

Love, Turddog