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Engine stalls when running in hot weather

Tiny
ITALYDADDY
  • MEMBER
  • 1986 FORD F-150
  • V8
  • 2WD
  • AUTOMATIC
  • 200,000 MILES
I have had this Ford for about a year now. When I got the truck it had many problems from poor maintenance and care from the previous owner.
When the weather is hot (I live in Florida so it gets real hot) I can drive the truck fine for about 45 minutes to an hour and then I will have gas troubles, The engine will backfire, lose performance and eventually die. If I let the truck sit until the sun goes down I can then go crank it up and it starts up and runs fine until the hot weather comes back. I get no indicaion of the engine overheating.
We are just entering into the warmer months and the truck ran great all winter but as soon as it got hot again the truck stalls.
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Tuesday, March 17th, 2009 AT 11:56 AM

4 Replies

Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Take a look at the distributor is there a gray box on the side with wire connector? If yes that is the TFI thick film ignition module. They go bad a crap out at high temps.
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Monday, April 26th, 2021 AT 6:00 PM
Tiny
ITALYDADDY
  • MEMBER
  • 2 POSTS
I just recently replaced the TFI module but was told that PIP sensor (inside of the distributor) was bad but was told this would not affect performance.
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Monday, April 26th, 2021 AT 6:00 PM
Tiny
RANGERDANGER17
  • MEMBER
  • 224 POSTS
Make sure the intake is clear air filter and the exaust is clear(not blocked)
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Monday, April 26th, 2021 AT 6:00 PM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Profile Ignition Pickup would be my second choice. Do not see many fail but after 14yrs it is likely. Not a reliable test unless it completly fails. It is responsible to signal TFI crank position and RPM so if it fails TFI will not fire coil.
Good luck
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Monday, April 26th, 2021 AT 6:00 PM

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