Mechanics

ENGINE IDLE ROUGH

1998 GMC C2500

Engine Performance problem
1998 GMC C2500 V8 Two Wheel Drive Automatic 280000 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.
Avatar
Justfisher
March 16, 2009.



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

Dr Loot
Mar 23, 2009.