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Idle RPM not consistant

  #1  
Old 06-20-2007, 06:33 PM
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Default Idle RPM not consistant

I have a buddy who has a 2005 Caddy. When he starts it the idle speed goes up and down, but this does not affect the performance. I thought maybe it was an oxygen sensor. Anyone have any other ideas?
 
  #2  
Old 06-20-2007, 11:16 PM
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Default RE: Idle RPM not consistant


idle speed controller .. 99% sure.

 
  #3  
Old 06-21-2007, 03:17 AM
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Default RE: Idle RPM not consistant

Thanks, I will let him know.
 
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Old 06-23-2007, 07:04 AM
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Default RE: Idle RPM not consistant

Just got an email from my buddy. He just got his car back from the garage. They reset the computer and now everything is OK.

I just wonder if it will last or the problem will show up again later.
 
  #5  
Old 06-23-2007, 08:56 AM
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Default RE: Idle RPM not consistant


that is no so common, but it does happen

what i have seen as most likley issues are:

- ISC,
- coke buildup in intake throat
- ignition issue - coils, wires, plugs, etc,
- emissions controls issues
- grounding issues
- ECU
- valve issues
- etc ..


 
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