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Engine miss.

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Old Sep 21, 2010 | 05:34 PM
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itswillist
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Engine miss.

I have a F-250 2006 5.4liter V8 gas engine.

The engine seems to miss here and there mainly when the fuel is low. I was thinking mainly it could be a bad fuel pump, trash in the gas tank, or a bad spark plug ?

Any guesses ? The truck has 103,000 miles. How often should the plugs and pump be changed ? And how hard is it to change these plugs out ?
 
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Old Sep 21, 2010 | 05:36 PM
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The plugs are supposed to be changed at 100k miles.

Any of the above mentioned reasons, plus a bad COP or spark plug boot, could cause a misfire condition.

To get a clue on where you should look, have your truck scanned with a code reader that will read PENDING CODES.
 
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Old Sep 21, 2010 | 06:03 PM
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I have a code reader and it isn't reading anything for pending codes, that's one reason I'm confused. I guess a bad fuel pump shows up in the codes ? What about trash in the tank ?
 
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Old Sep 21, 2010 | 08:26 PM
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If you have changed the fuel filter then do the plugs as reford said, they are due.
Take those plugs out and lay them down in the order of where they were.

Look at them and evaluate.

Maybe you can identify a weak one. COPS are suspect.
 
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