Question about GMC C2500
Posted by Anonymous on
These engines were notorious for an intake gasket problem make sure the antifreeze isn't in the oil or vice versa. A bad intake gasket will make it suck air into combustion chamber causing a misfire
Posted on Aug 25, 2017
Could be a bad coil - check that?
Posted on Aug 25, 2017
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Posted on Jan 02, 2017
hi there, if you can feel the misfire at an idle but not at a higher rpm than the fuel pressure regulator is bad im working on one right now that has mifire code and random misfire codes coming up
Posted on Aug 28, 2008
you can try changing the ignition coil, I own a 97 Dodge 1500 and mine did the same and thats what i had to do.
Posted on Oct 08, 2008
couple of things, did you actually gap the plugs yourselfor did you go on the assumption that they are pre gapped ? are the lead wires all in the correct firing order ? Is it possible a vacuum line got dis-connected ? I would also check the cap and the rotor.
Posted on Oct 27, 2008
I had a similar problem with a vortec. cause was faulty intake gaskets. The plastic gaskets sag in the middle over time and allow air between the intake and head. Felpro makes a steel/rubber replacement that is much better. hope that works for you.
Posted on Mar 01, 2010
Testimonial: "thanks it turned out to be an intake gaskit it runs great now! you are right the left bank gasit sagged as you mentioned."
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