2002 4.0L Idle Problem
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Senior User
Joined: Sep 2004
Posts: 177
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From: Fort Payne, Alabama
2002 4.0L Idle Problem
My brother has a 2002 Ford Ranger Edge 4.0L, a while back he took it in to the shop because when he was letting off the clutch(its a stick), the rpms would stay up... They replaced a sensor or 2 on it, and after a BIG deal about doing warranty work he got it back and it did ok for a while, but now it has started it again. Any ideas of what to do? I have a good idea he's not the only one with this problem... Thanks for any help
Mountain Pass
Joined: Mar 2004
Posts: 249
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From: Santee, CA
I've been combating this problem on my '99 4.0 for several months. I took it to the dealer to ask about any recalls, but there were none. The service rep pulled up a TSB about this problem which mentioned a chafing issue on a wire loom that passes under the driver's seat area. It seems to be a somewhat common problem for this motor, and I haven't found any definitive answers or fixes. It's irritating as hell though, and hard on my trannie trying to shift into first from a stop when the engine is still running at 1200 RPMs. I scanned for codes and found none, and have already replaced the IAC (idle air control solonoid/valve). I couldn't find any vaccum leaks either. It idles okay w/o the IAC hooked up, but since it's a very slow return to idle, the computer seems to be using the IAC to make slow corrections for something. I also asked the service rep about any newer versions revisions for the computer that it might need to be "flashed" to (as someone here suggested to me when I posted about it), but he said there were none.
Let me know if you find more success than me.
Let me know if you find more success than me.
Last edited by rebturtle; Aug 30, 2005 at 09:54 PM.
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