Question about 1991 GMC C1500
It sounds like you may have an intake leaking. You've replaced the major components so now you need to look for a possible vacuum leaking. The intake gaskets is the easiest part to check. Get a can of brake clean. While the engine is running, spray the brake clean on the top center of the engine. The engine may idle up or idle down or may smooth out. Try this and see what you come up with. If this does not solve you problem, let me know and I will help you figure it out.
Posted on Jan 06, 2009
Tips for a great answer:
Jan 28, 2013 | 1995 Chevrolet K1500
Jun 28, 2011 | 1989 GMC K1500
Jun 18, 2011 | 1987 Nissan Maxima
Sep 14, 2010 | 1996 Jeep Grand Cherokee
Jul 31, 2010 | 1995 Chevrolet K1500
Apr 01, 2010 | 1996 Chevrolet K1500
Mar 06, 2010 | 1998 Chevrolet K1500
Feb 12, 2010 | 1996 Chevrolet K1500
86 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: