I've checked the timing and ensured the idle is adjusted properly. The cooling system is operating normally. I'm stumped
Apr 30, 2010 at 5:20 AM
MERLIN2021
✓Experienced Mechanic
17,250 POSTS
Get some GM decarbon and follow the directions on the can, sounds like a bit of hot carbon is the cause. Of course that is if you are sure about the timing!