Question about 1989 Ford F 150

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My 89 f-150 300,000 miles starts great runs great with good oil pressure never been hot loses power at times and will die when idling. the check engine light comes on immediately when this happens and

Fuel pumps, checked wiring and fuses

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Check all vacuum hoses for deterioration /hard /loose. Check power brake booster for air leaks with the foot on the brake (idle will drop or stall)

Posted on Nov 22, 2014

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Posted on Jan 02, 2017

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daves944
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SOURCE: Buick Regal dying

You have a problem in the fuel pump relay circuit for sure then. I'm betting the relay, but it could be that dropping resistor.

Posted on May 11, 2009

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