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08 silverado cold idle issues

Old Feb 2, 2014 | 03:05 PM
  #11  
Jeff_383's Avatar
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Ok, I cleaned the throttle body and let the battery disconnected for 15 minutes. It no longer wants to die at idle, but now it has a difficult time returning to idle when driving up to a stop sign or light. When stopping it wants to hold a higher idle longer or drops to ~500 and then back to ~1100 and then eventually back to a normal idle. I know, check codes. I just didn't get there yet (if there is no light on now, will a code be in the ECM?).
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Old Feb 4, 2014 | 09:57 AM
  #12  
gagliano7's Avatar
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From: warwick,ny
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Could be a vacuum leak.
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