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Thread: 2002 5.4 issues

  1. #1
    Senior Member btoolguy1's Avatar
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    2002 5.4 issues

    2002 start then doesnt. 45000 miles, auto. Did fuel filter, then went to mechanic and got 1 COP based on scan. Started again so replace relay and fire right back up. Now everyone other day it takes multiple tries an hour apart to fire up.

    The COP definitely made a difference.

    Is there ecu type thing? Grounding issue?

  2. #2
    Senior Member lee reece's Avatar
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    Joe might be able to help if it's the issue with water from ac dripping on cop's. Supposed to be a kit yup install to prevent this! He'll post in a bit prob.

    2007 F150 XLT FX2 SPORT - 5.4l 3V 3.73 LIMITED SLIP EDGE/EVOLUTION PROGRAMMER

  3. #3
    Senior Member btoolguy1's Avatar
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    Thanks, this seems different than the last issue where cop was replaced, it ran rough before that. Was trying to say all what was done to it in the last month. But i guess could be a drip and another cop or the same 1 again.

    I appreciate the help!

  4. #4
    Chief Moderator Jersey_Joe's Avatar
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    Quote Originally Posted by btoolguy1 View Post
    2002 start then doesnt. 45000 miles, auto. Did fuel filter, then went to mechanic and got 1 COP based on scan. Started again so replace relay and fire right back up. Now everyone other day it takes multiple tries an hour apart to fire up. The COP definitely made a difference. Is there ecu type thing? Grounding issue?
    If it's a coil pack it should fire no prob

  5. #5
    Senior Member btoolguy1's Avatar
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    What i thought. Some gremlin. Guess he will take back to mechanic to leave say will leave hooked up to try to reproduce problem.

  6. #6
    Senior Member btoolguy1's Avatar
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    Could it be a fuse and not the relay?

  7. #7
    Senior Member btoolguy1's Avatar
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    Was fuel pump

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