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1998 GMC C2500 Engine Idle Rough

Tiny
JUSTFISHER
  • MEMBER
  • 1998 GMC C2500
  • V8
  • 2WD
  • AUTOMATIC
  • 280,000 MILES
The engine on my GMC 2500 is idling rough when I put it into drive, but once I get to about 2000-2500 rpms it quits and it drives fine. What would be causing this.
Monday, March 16th, 2009 AT 2:17 PM

1 Reply

Tiny
DR LOOT
  • MECHANIC
  • 2,311 POSTS
You may have a vacuum leak, make sure you check all of your vacuum lines, and be careful they are very fragile, because in 2000 to 2500 rpm, the engine is producing minimal vacuum, that might be a problem
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Monday, March 23rd, 2009 AT 8:21 PM

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