Question about Ford F-150

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94 f-150 runs rough

Just installed jba headers on my 94 f-150. Took it out for a quick drive and everything was fine, then went out again and got to about 30 mph and it lost power and would not accellerate. Everything was fine before I installed them but i had a problem with the plug wires before so i changed them to better ones. Problem is still there and now I have a rough idle.

Any suggestions?

Thanks,
Jay

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  • 2 more comments 
  • jayt6354 Sep 06, 2009

    Fuel injected and the check engine light did come one a couple of times. It only has one o2 sensor and it is on the y pipe.

  • jayt6354 Sep 06, 2009

    A while back I had a problem with the wire boots melting and switched them out. So i checked them yesterday and the same problem occured so i bought a better set and when I started it up the engine had a rough idle so i did not try to drive it. The dist. cap is no more than 3 months old. but i will check it.

  • jayt6354 Sep 08, 2009

    Thanks guys for the help. The wire problem was only half the battle. Turns out the gasket sealant i used to connect the y-pipe was not safe for o2 sensors. I replaced the spark plug wires with a bosch set and the sensor with a new bosch and now she is as smooth as ever.

    Problem solved thanks everyone.

    Jay

  • Sean Wright
    Sean Wright May 11, 2010

    Carb or fuel injection? Check engine light? Are the O2 sensors good and installed?

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  • Master
  • 1,129 Answers

The distributor cap and rotor should be changed if this does not help replace the ignition module located within the distributor Headers increase the local temperature near the spark plug boots make sure you have a thick high quality spark plug wire boot surrounding the spark plugs, an old timer trick is to start the truck up cold at night in a dark local and spray the plug wires and dist. cap with a light mist of water to detect any weakness in the ignition wiring, any arc outs see must be adressed.

Posted on Sep 06, 2009

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  • Ford Master
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Glad we could help ya out

Posted on Sep 09, 2009

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