Shakes @ idle in D or R - The 1947 - Present Chevrolet & GMC Truck Message Board Network

farmerfred · 11-24-2006, 05:24 PM

I got my truck to idle nicely today (8 BTDC @ 600 RPM). It also runs well. The problem is at idle when you're in drive or reverse, the truck shakes. No adjusting of the timing or the carb would take care of this. When I put a vacuum gauge on it, the needle fluctuated between 9-15 in Hg. When I revved the motor, I'd get 10-22+ in Hg., still fluctuating. I'm thinking it's worn valve guides. Sound reasonable? Other possibilities?

11-24-2006, 05:24 PM	#1
farmerfred Registered User Join Date: Mar 2006 Location: ohio Posts: 66	Shakes @ idle in D or R I got my truck to idle nicely today (8 BTDC @ 600 RPM). It also runs well. The problem is at idle when you're in drive or reverse, the truck shakes. No adjusting of the timing or the carb would take care of this. When I put a vacuum gauge on it, the needle fluctuated between 9-15 in Hg. When I revved the motor, I'd get 10-22+ in Hg., still fluctuating. I'm thinking it's worn valve guides. Sound reasonable? Other possibilities? __________________ 1972 C-20 350



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.