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4.0 SOHC Starting Problem

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Old Feb 17, 2008 | 09:31 AM
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4.0 SOHC Starting Problem

I have a 2001 Ranger XLT 2WD, Auto Trans, 55,000mi. Recently I have experienced a drop in rpm when putting it in park. It drops to about 500rpm, then picks back up. Yesterday I drove to work, out to lunch with no problems. I went to go home and it wouldn't run. It would crank fine, but not start until I gave it a little throttle. It would then run, but really rough. If I tried to let it idle, it would die. When it did run, there was no CEL. I left it at work overnight. I went to work this morning and it started up fine with no problem. I started it several times during the day and didn't have any problem driving it home.

Any help would be deeply appreciated.
(I had origianlly posted this in the ranger forum)
 
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Old Feb 17, 2008 | 10:09 AM
  #2  
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Your idle air valve is sticking. Either need to replace it or clean, I believe its on the center top of the intake plenum underneith the "4.0 SOHC" cover
 
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