89 ford f150 inline 6

Asked by Apr 28, 2017 at 07:22 PM about the 1989 Ford F-150 XLT Standard Cab LB

Question type: Maintenance & Repair

Truck starts every time its cold, but drive it for a a distance, shut it off, it
struggles to start again, like the battery is dead
While driving any distance with the ac on, it will stutter and stall, does not do
that of the ac is not used
If the truck stutters and stalls, it wont restart, until you let it cool off for q while
Ive replaced everything i can think of, and it still has this issue
any help would be appreciated

2 Answers

76,235

Well, I believe there is a problem with the starter once the engine gets warmed up, worn starter bushings cause the starter not to work, crank slowly, should have the starter checked. The stalling issue could be just the engine needing to be gone over, cleaning the Mass Air Flow Sensor with MAF spray cleaner and cleaning the throttle body with carburetor cleaner. Check the cap and rotor, along with spark plugs. Snug up the intake, exhaust manifolds.

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880

Those older Fords would often stall out due to lack of spark when they heat up under the hood. The problem part is the electronic spark control module. They are a silver colored ribbed metal unit, 4"x6" and 2" thick, mounted on the fender wheel. They have wire harness that plugs into them. Lots of older Fords had them and they cut out when hot. I would throw snow on mine to get home. Check things out before buying parts but this is a common problem that's hard to diagnose. It makes sense that running the A/C makes it get worse....hotter under the hood. I hope this helps.

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