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post #1 of 2 (permalink) Old 02-16-06, 05:41 PM Thread Starter
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please help, I own a 1997 f150 5.4 and I have a problem. ok when I drive at 55 and give it a little gas it misses chugs or something. Dose not only happen at 55 it is just a steady speed and then give it gas. Any Ideas? coil pack, plugs, injectors. I have know clue. The computer says it;s misfiring. Could a o2 censer do that? please help. tks scott

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post #2 of 2 (permalink) Old 02-16-06, 08:49 PM
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Re: help

Hey zman12, welcome to Ford Forums

Do you have a computer fault code download option on that? ie: will give you some leads.

There could be a number of things. I gather that it just seems to miss anytime you accelerate?

Simple things first............

Could be blocked injectors. You can take it to a special place that will do a proper fuel injection clean - it can really wake up your car if thats the problem.

Blocked fuel filter?

Pull your spark plugs and look for one thats darker (oily) than the rest - this could indicate a dodgy plug. Just put a new set in.

Ignition leads can breakdown and earth out on the engine causing misfiring problems. You can pull one spark plug lead off the distributor at a time and see of the idle revs drop or one doesn't cause as big a drop as the others. This can indicate a dud lead or spark plug.

Inspect the inside of the distributor cap and rotor arm for a nice clean condition.

O2 sensors can cause the engine to operate poorly as the fuel injection is regulated by signals from this.

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