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Misfire

Discussion in 'Stock 2002 - 2005 Explorers' started by Jeff Simon, August 20, 2019.

^^Searches ExplorerForum.com^^





  1. Jeff Simon

    Jeff Simon New Member

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    City, State:
    Fond du Lac, Wi
    Year, Model & Trim Level:
    05 Ford Explorer XLT 4.0
    I've had a misfire code keep coming up on my 05 explorer xlt 4.0 by for the last 6 months. I've replaced plugs, plug wires, coil pack, injectors, fuel filter, EGR, fuel pressure sensor & air filter. I get different cylinder misfire codes everytime I reset and check it. When I'm accelerate the check engine light will start flashing and the motor will turn off. I shut it off and restart it. Than it will do the same thing after a few miles down the road. Please help.
     
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  3. XLTyler83

    XLTyler83 Member

    Joined:
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    City, State:
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    Year, Model & Trim Level:
    2004 XLT 4x4 Loaded
    Was it by chance a Cheap after market coil pack? I’ve seen those become a nightmare. Also motorcraft plugs are the best.
     
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  4. Drewmcg

    Drewmcg Elite Explorer

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    Year, Model & Trim Level:
    2010 XLT 4WD
    2002 XLS 2WD
    Bad timing on one bank can cause random misfires. Mileage? Any rattle at startup?

    Sometimes, but less likely, clogged cat on one bank can cause intermittent misfires (drive to excessive backpressure). A mechanic can check for this (Eric O. did a video on SMA's YouTube channel, though not on an Explorer).

    If you replaced an OEM coil pack with an aftermarket one, get the OEM part back (if you can), and consider re-installing it. See my recent tale of woe on this forum for reason.
     
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  5. Drewmcg

    Drewmcg Elite Explorer

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    Year, Model & Trim Level:
    2010 XLT 4WD
    2002 XLS 2WD
    Also, what are your fuel trims? Maybe excessive vacuum leak?
     
  6. Jeff Simon

    Jeff Simon New Member

    Joined:
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    City, State:
    Fond du Lac, Wi
    Year, Model & Trim Level:
    05 Ford Explorer XLT 4.0
    Motor craft plugs and coil pack.
     

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