runs great till it warms up

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02-08-2008, 06:34 PM

jeff_rausa

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runs great till it warms up

i have an 86 f150 4x4 with an EFI 5.0 it wouldnt run I found that the fuel pressure regulator was bad, replaced it and now it runs great till it gets to operating temp then just starts getting rougher and rougher till finally dosent want to run at all.any suggestions would be apreciated. jeff_rausa@yahoo.com

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02-08-2008, 11:01 PM

Surge08

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Maybe a Coil. Coils are know when once warmed up to act up and stall engine

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02-09-2008, 03:15 AM

Ranger GT2

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Have you tried to pull any codes from the computer?

Do you know what the fuel pressure is now since you changed regulator? Is your pressure in the normal range when it start running bad?

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