power failure

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Feb 16, 2004 | 10:41 AM

tastroud

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Joined: Feb 2004

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power failure

I have a 79 F-150 w/ 351m. I have a problem i am trying to work out. The truck will start and run fine, but once the truck has been driven for 30-40 minutes, it will just loose power while driving down the road. It will restart and continue running at idle speed, but does not have the power to allow me to drive it. I can let it set for several hours, let the engine cool, and start it right up and drive it home. Initially i thought it was an alternator, or charging syatem problem, but i can test the battery, and the alternator, and they are working fine. Any suggestions?

Thanks
TASTROUD

Feb 16, 2004 | 10:53 AM

bob arrington

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Joined: Jul 2003

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From: alaska

fuel filter , a plugging cat, a controll module going bad,good luck,bob

Feb 17, 2004 | 08:06 PM

bigperm2

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Joined: Jan 2004

Posts: 367

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From: denver

it also could be a bad fuel pump or vapor lock. I have the same problem w/ my bronco, and I believe it is vapor lock. I am in the process of installing an electric pump!!
my $.02
-dan