The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Help!!!1968 6cyl w/New exhaust manifold and rebuilt carb. Runs like crap

Wrenchbender Ret · 08-28-2012, 04:05 PM

When the choke is off the fast idle cam should not be contacting the throttle shaft lever. You should be able to adjust the idle speed with the speed screw or the selinoid that is in the photo.
I agree the manifold heat rizor will not cause this problem.
They could have the cam upside down. Sometimes the gasket between the fuel bowl & throttle body is not in correct or they could have usaed the wrong one, as 2 different gaskets come in the kit.

08-28-2012, 04:05 PM	#6
Wrenchbender Ret Registered User Join Date: Oct 2005 Location: Overland Park, Ks. Posts: 5,229	Re: Help!!!1968 6cyl w/New exhaust manifold and rebuilt carb. Runs like crap When the choke is off the fast idle cam should not be contacting the throttle shaft lever. You should be able to adjust the idle speed with the speed screw or the selinoid that is in the photo. I agree the manifold heat rizor will not cause this problem. They could have the cam upside down. Sometimes the gasket between the fuel bowl & throttle body is not in correct or they could have usaed the wrong one, as 2 different gaskets come in the kit.