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Old Mar 9, 2004 | 10:52 PM
  #1  
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ddawg
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Unhappy rough idle

my 2004 lariat crew cab has a rough idle when in drive when stopped. When the a/c is on it is smooth as glass. I am getting nowhere with nthe dealer. Any suggestions?
 
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Old Mar 9, 2004 | 11:09 PM
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DonsFx4
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From: Marple Township, PA
Could be that the basic idle setting is too low. There was a comment about that in a thread about 4 weeks ago. In that case, they just increased the idle speed and all was OK.

Having the AC on causes a higher idle RPM to be commanded, to compensate for the 'drag' of the compressor. Since it seems to run OK w/ AC on, the computer is calling for a higher idle and bringing it up to where the engine seems smooth.

Give it a shot before anything else...nothing to lose! -Don
 
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Old Mar 10, 2004 | 10:13 PM
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I will try to have someone reset the idle speed, maybe it will help. Thanks
 
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