Dismiss Notice

to Ford Explorer and Ranger owner generated reviews, discussion, tech tips, how to articles, off-road modifications, events, and more! Since 1996 we have been the #1 Ford Explorer resource on the Internet. We also cover the Explorer Sport Trac, Mercury Mountaineer, Lincoln Navigator, Mazda Navajo, Mazda Pickups, and the Aerostar.

Register Today It's free! This box will disappear once registered!

2002 Sport Rough Idle Fix

Discussion in 'Tips and Technical Info posted by Technician's' started by pcgreene, May 16, 2006.

  • Searches ExplorerForum.com
    1. pcgreene

      pcgreene New Member

      Joined:
      May 16, 2006
      Messages:
      1
      Likes Received:
      1
      Trophy Points:
      0
      City, State:
      Garland, TX
      Year, Model & Trim Level:
      '02 Sport
      2002 Sport 64k miles. Had rough idle while sitting still, cold and warm. P0171 and P0174, bank 1 & 2 lean codes. Ran fine at speed. Replaced MAF and fuel filter. Cleaned IAC with electronics cleaner. No help. Saw info in forum about intake manifold gaskets (ONP 00M12), so I took it to Ford. They found collapsed PCV tube was causing problem. $40 + $180 labor, and it runs better than it has in weeks. No more check engine light. Hope this helps someone fix their own problem.
       
      • Like Like x 1
    2. Support EF

      Join the Elite Explorers for $20

      Explorer Forum has probably saved you that much already, and will continue to save you money as you learn how to diagnose fix problems yourself, and learn which modifications work without having to experiment on your own. Elite Explorer members see practically no ads, can add their own profile photo, upload photo attachments directly to your posts and Media Gallery, create more private Conversations, and more. Join Today. Your support is greatly appreciated.


      to hide adverts.
    3. ExplorerDMB

      ExplorerDMB Moderator/Technician Moderator Emeritus

      Joined:
      January 26, 2004
      Messages:
      6,209
      Likes Received:
      2
      Trophy Points:
      0
      City, State:
      Mechanicsville, Virginia
      Year, Model & Trim Level:
      2004 Acura TL
      Moving to Technican Corner...

      -Drew

      PS - And let this be a reminded to everyone: just because you havea typical lean code(s) doesn't mean the typical problem (intake gasket). It can always be something similar.

      -Drew
       
    4. kd_explorer

      kd_explorer New Member

      Joined:
      May 22, 2006
      Messages:
      3
      Likes Received:
      0
      Trophy Points:
      0
      City, State:
      BLM, IL
      Year, Model & Trim Level:
      '01 Sport
      pcgreene,

      I think I might be having a similar issue with my '01. From just a quick look, I "think" the PCV comes from the back of the driverside valve cover and loops around the back of the engine. Is this the tube that was collapsed on your truck?
       
    5. dvdebel

      dvdebel New Member

      Joined:
      June 5, 2006
      Messages:
      2
      Likes Received:
      0
      Trophy Points:
      0
      City, State:
      georgia
      Year, Model & Trim Level:
      2002 Sport Trac XLT
      I have the exact same condition on my 2002 Sport Trac. Just about the same mileage and same codes. I have replaced the MAF with no change, but have not proceeded past that point. One other situation, with no load on the engine(in park), if I apply wide open throttle, the engine revs to 3K RPM and misses while maintianing that RPM. If I do the same while loaded(in drive), I have no issue. Is that a normal function of some sort of rev limiter, or is it an indication of my "lean bank 1 and 2" condition?

      Thanks for any help offered
       
    6. ExplorerDMB

      ExplorerDMB Moderator/Technician Moderator Emeritus

      Joined:
      January 26, 2004
      Messages:
      6,209
      Likes Received:
      2
      Trophy Points:
      0
      City, State:
      Mechanicsville, Virginia
      Year, Model & Trim Level:
      2004 Acura TL
      yes that's a rev limiter
       
    7. dvdebel

      dvdebel New Member

      Joined:
      June 5, 2006
      Messages:
      2
      Likes Received:
      0
      Trophy Points:
      0
      City, State:
      georgia
      Year, Model & Trim Level:
      2002 Sport Trac XLT
      Many thanks... I guess I'm off to the Ford store. Too may variables and too little free time!
       
    8. SyberTiger

      SyberTiger Active Member

      Joined:
      May 18, 2007
      Messages:
      602
      Likes Received:
      31
      Trophy Points:
      38
      City, State:
      Orlando
      Year, Model & Trim Level:
      2002 Limited 4x4 4.6L
    9. campesino805

      campesino805 New Member

      Joined:
      July 26, 2008
      Messages:
      1
      Likes Received:
      0
      Trophy Points:
      0
      City, State:
      Louisiana
      Year, Model & Trim Level:
      02 Sport Trac 4L SOHC 2WD
      2002 Sport Trac 4.0 Liter SOHC
      Same thing. Rubber elbow on PCV vent (look between oil fill and throttle) failed... $5 easy fix with elbow from O'Reiley's cut to fit. Failure probably due to age + heat resulting in "collapse" of rubber elbow.
       
    10. Brits02Sport

      Brits02Sport New Member

      Joined:
      August 9, 2008
      Messages:
      8
      Likes Received:
      0
      Trophy Points:
      0
      Year, Model & Trim Level:
      02 Sport
      I have a similar problem with my '02 4.0 v6 explorer sport. Runs fine, has ck engine light on (but has been on/off for a while). Problem is with the idle. It will sit at about 600rpm then intermittently it will drop and act like its going to stall (has stalled a cpl times). Its worse with the ac on (extra load).
      I believe I have located this elbow (passenger side, connects to engine and then another hard pipe that runs round the back of the engine). There is a smaller hose over the top of it.
      Anyway there is a hissing noise that gets louder when I move this elbow up & down slightly, and it is obviously collapsing slightly but I cannot see a split from the top.
      Now question is: What size elbow/hose do I need and where to get it. Also how does this attach? Does it just pull off both ends? It looks like there may be some sort of clip on the bottom of the elbow at the engine end.

      Thanks for any help
       
    11. aldive

      aldive Elite In Memoriam

      Joined:
      January 17, 2001
      Messages:
      24,727
      Likes Received:
      2
      Trophy Points:
      0
      Year, Model & Trim Level:
      1999 XLT
    12. Brits02Sport

      Brits02Sport New Member

      Joined:
      August 9, 2008
      Messages:
      8
      Likes Received:
      0
      Trophy Points:
      0
      Year, Model & Trim Level:
      02 Sport
      Thanks for your reply and I read the whole thread........but didn't really help a non mechanic to replace this collapsing rubber elbow. I don't need a perfect idle just a non-stalling one (keeps the wife happy).
       
    13. Brits02Sport

      Brits02Sport New Member

      Joined:
      August 9, 2008
      Messages:
      8
      Likes Received:
      0
      Trophy Points:
      0
      Year, Model & Trim Level:
      02 Sport
    14. albeegood

      albeegood New Member

      Joined:
      August 27, 2014
      Messages:
      37
      Likes Received:
      0
      Trophy Points:
      6
      City, State:
      New Jersey
      Year, Model & Trim Level:
      98 Explorer Sport 4x4
      Wow, I was just think can my rough start be my pvc valve after seeing it in the trouble shooting section for rough start. Thx. Was yours always having roughy start or every now & then like me??
       

    Share This Page









    We Support Our Troops!