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2005 Ford Explorer XLS 4.0 V6 issues

Discussion in 'Stock 2002 - 2005 Explorers' started by James H White, December 1, 2019.

^^Searches ExplorerForum.com^^





  1. James H White

    James H White New Member

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    Location:
    Orleans, Massachusetts
    Year, Model & Trim Level:
    2005 Ford Explorer XLS
    Callsign:
    Jimi
    Rough idling, bad fuel mileage
     
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  3. swshawaii

    swshawaii Elite Explorer

    Joined:
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    City, State:
    Kailua-Oahu, Hawaii
    Year, Model & Trim Level:
    '05 Sport Trac XLS (RWD)
    Check engine light or stored trouble codes? Most larger auto parts stores will check for free. Call around.

    If any, WRITE the p0 NUMBERS down and post them here.

    OBD-II Diagnostic Trouble Codes (DTCs)
     
  4. Mike65

    Mike65 Elite Explorer

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    Location:
    In my garage working on one of our vehicles.
    City, State:
    Toms River, NJ
    Year, Model & Trim Level:
    00 Ranger 4x4, 99 Sport.
    Welcome James.
     
  5. James H White

    James H White New Member

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    Location:
    Orleans, Massachusetts
    Year, Model & Trim Level:
    2005 Ford Explorer XLS
    Callsign:
    Jimi
    Thanks Mike
     
  6. BrooklynBay

    BrooklynBay Moderator & long time member. Staff Member Moderator Elite Explorer

    Joined:
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    City, State:
    Brooklyn, NY
    Year, Model & Trim Level:
    88 89 93 95 96 Aerostars
  7. James H White

    James H White New Member

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    Location:
    Orleans, Massachusetts
    Year, Model & Trim Level:
    2005 Ford Explorer XLS
    Callsign:
    Jimi
    Yes, no difference
     
  8. MotoDan

    MotoDan New Member

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    City, State:
    Chesterfield, Missouri
    Year, Model & Trim Level:
    '02 XLT
    Check your fuel pressure. There's a Schrader valve at the end of the fuel rail where you can attach a gauge. Believe it should be approx 43 psi. If it's much higher than you probably have a shot fuel pressure regulator. Engine will run rich (rough idle, etc) and poor MPG. Easy check, cheap fix. Good luck!
     
  9. Merlin Tibbitts

    Merlin Tibbitts New Member

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    City, State:
    Aurora, Colorado
    Year, Model & Trim Level:
    2002 Explorer xls
    I had the same issue years ago on my 02 xls, no engine light the scanner readings were normal?!? I replaced my plugs and wires considering that they had over 50,000mi on them. Then I noticed that the rough idle issue seemed to happen on cold starts, she acted as if she wanted to stall out at times. MAF sensor seemed fine and considering that I change my air filter on every oil change(5,000mi) it had better been clean. At the time I had never flushed out my coolant and considering the miles the vehicle had and the role the engine coolant temp sensor plays I went ahead and replaced that as well. Although all of the above needed to be done and did improve the engine performance she still had the same rough idle issue?!? My next step was fuel pressure but before I went to test it I had to consider that the fuel filter had never been replaced on the vehicle. So I replaced the fuel filter and the other was seriously plugged up, thankfully the pressure checked out after the filter replacement...

    The damn thing still had the dreaded rough idle?!?

    The next thing and only other thing I had left was the IAC valve, I replaced it OEM of course and behold!!!

    No more rough idle.
     
  10. swshawaii

    swshawaii Elite Explorer

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    '05 Sport Trac XLS (RWD)
  11. James H White

    James H White New Member

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    Location:
    Orleans, Massachusetts
    Year, Model & Trim Level:
    2005 Ford Explorer XLS
    Callsign:
    Jimi
    Thanks Merle, I have been researching the IAC for my year Explorer, was told there is no IAC valve, that it was built in to the throttle body, which I already removed and cleaned, I went to Advance Auto, tech put code reader on pcm, said vehicle had gas vacuum leak, changed pcv valve, checked all hoses, I’ll try to smoke the system see if idle changes. By the way, this website is great, awesome support!
     
  12. James H White

    James H White New Member

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    Location:
    Orleans, Massachusetts
    Year, Model & Trim Level:
    2005 Ford Explorer XLS
    Callsign:
    Jimi
    Thanks MotoDan, that will be my next check, really appreciate the support
     
  13. James H White

    James H White New Member

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    Location:
    Orleans, Massachusetts
    Year, Model & Trim Level:
    2005 Ford Explorer XLS
    Callsign:
    Jimi
    Thanks Swshawaii, did get the code at Advance Auto, forget to write it down, but the tech said it was a general non specific code, and that I had a gas vacuum leak. I’m checking all the hoses, valves that might be the culprit.
     
  14. Merlin Tibbitts

    Merlin Tibbitts New Member

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    City, State:
    Aurora, Colorado
    Year, Model & Trim Level:
    2002 Explorer xls
    Right on James, I do know that on my 02 4.0 the IAC is mounted to the throttle body. Based on my Explorer 2002- 2006 service manual I had assumed they all had the same setup.

    Good luck.

    Merlin
     
  15. Merlin Tibbitts

    Merlin Tibbitts New Member

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    City, State:
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    Year, Model & Trim Level:
    2002 Explorer xls
  16. James H White

    James H White New Member

    Joined:
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    Location:
    Orleans, Massachusetts
    Year, Model & Trim Level:
    2005 Ford Explorer XLS
    Callsign:
    Jimi
    Thanks for help, have a great holiday, stay healthy
     

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