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1987 F150 fuel problems?

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Old Dec 1, 2015 | 06:36 PM
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snublifeFFSP's Avatar
snublifeFFSP
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1987 F150 fuel problems?

Hi I have a 1987 F150 V 8 302 EFI. The motor does not run right. It starts and runs fine when it is cold. Once it warms up, I have to keep it above 1000 rpm or it will die. Once I'm driving it runs really smooth. I changed out distributor cap and rotor, spark plugs and wires, ignition coil, in tank fuel pump, high pressure fuel pump, and changed the transmission fluid and filter and still no difference. Any help would be greatly appreciated. This is my only vehicle
 

Last edited by snublifeFFSP; Dec 1, 2015 at 06:39 PM. Reason: forgot something
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Old Dec 22, 2015 | 07:00 PM
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It is definitely a vacuum leak. Probably around the IAC valve or the ERG. Look for loose hoses and a hissing sound.
 
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