I'm pulling my hair out with my 1972 GMC Jimmy 5.7L V8 4WD. I keep getting a hesitation off of idle that if I don't accelerate out of, the truck bogs down. Also, idle is fairly smooth but you can hear a slightly audible miss and watch it on the tach. I've adjusted timing, replaced everything in the idle circuit but the distributor, replaced intake manifold gasket, new carburetor, adjusted idle mixture. I don't know what else to do. Any ideas?
Tuesday, April 9th, 2013 AT 4:22 PM