Question about 1987 Ford F 150

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Ford truck wont run right

I have been trying to get a 1987 F-150 6 cylinder, fuel injected,to run for a few days now....starts hard and runs at low rpm ,even when floored...customer stated it started backfiring and loosing power on the way home one night last week...then slowly lost power till it wont pull its own weight...so far I have checked and replaced all plugs,dropped tank and changed fuel,checked for power and fuel pump operation..(in tank and on frame rail pumps)changed fuel filter,cat converter is long gone,but it runs like the exaust was plugged(Dual cherry bombs) so I cut them off before the muffler just to check to see if thet got plugged....no help at all..also truck seems to heat up real fast ...Possible head gasket???injectors plugged from some bad gas???ignition module not giving enough spark????fuel presure regulator???I am at a standstill and the customer needs his truck for work...any input will be appreciated...Lee

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  • Lee Sep 08, 2009

    it would have to be a major vac leak,tps is not an issue and all injectors are working...its not a misfire...rums on all 6 but wont rev up...and the thing that confuses me the most is why it gets so hot so fast...Lee

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Checked for vacuum leaks,tps switch, are the injectors clicking all of them

Posted on Sep 07, 2009

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