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1999 Ford Expedition Question: how long should replaced spark plugs and wires last before needing to be replace

 

Question

pele09, Lakewood, CA, February 21, 2013, 14:05
 Rookie

had the plugs and wires replaced 30 months ago and they say I need them again, does that sound right?

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  • Answer #1

    goodguy February 21, 2013, 14:21
     Master

    depends on how many miles you have put on it

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  • Answer #2

    rpclements February 21, 2013, 15:03
     Journeyman

    Does vehicle have a check engine light on? I assume vehicle is 4.6L- 5.4L has coil over plugs. If you didn't put too many miles on and is misfiring on particular cylinder suspect coil if 5.4L. Give us some more info so we can try and help- who's they and reason you took for service?

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    pele09, February 21, 2013, 15:09
     Rookie

    check engine soon light came on and is running rough when first started. 4.6 engine and I put on abour 20,000 miles since having the wires and plugs replaced at the same repair facility.

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    rpclements, February 21, 2013, 15:35
     Journeyman

    Did they give you code from engine light?

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  • Answer #3

    pushrod February 21, 2013, 17:22
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     Master

    You say it runs rough at start up, does it clear up after? Where did the replacement parts come from?
    Most premium parts have a lifetime replacement warranty! If it runs ok after it warms up then it aint plugs or wires.
    No way it SHOULD need those parts again at that mileage or time period. IF prem. parts were installed.

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    pele09, February 22, 2013, 09:00
     Rookie

    that's what I thought, thanks for your reply

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