The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post

Class of 69 · 11-13-2003, 11:50 AM

A couple ideas...did you ever pull the valve covers to check for a loose rocker arm?? I.E. out of adjustment..worn, or flat lobe. If it has power brakes, you have the potential for a "big ole' vacumm leak". Pull the hose off the carb base, and plug the port (naturally!). Then see what it does. I wouldn't recommend driving it with the rebuilt carb till you get this solved, as you probably know, cause you don't want to ruin the rebuild. Sorry to hear you're still having trouble...we've all been there, and it gets REALLY frustrating....dammit!!!

11-13-2003, 11:50 AM	#4
Class of 69 Registered User Join Date: Mar 2003 Location: Stillwater MN Posts: 1,166	A couple ideas...did you ever pull the valve covers to check for a loose rocker arm?? I.E. out of adjustment..worn, or flat lobe. If it has power brakes, you have the potential for a "big ole' vacumm leak". Pull the hose off the carb base, and plug the port (naturally!). Then see what it does. I wouldn't recommend driving it with the rebuilt carb till you get this solved, as you probably know, cause you don't want to ruin the rebuild. Sorry to hear you're still having trouble...we've all been there, and it gets REALLY frustrating....dammit!!! __________________ 69 GMC K10 ..some restoration required....still..