The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Hard start & poor off-idle acceleration

ItsRandy · 03-09-2011, 12:52 AM

Sounds like it is running lean to me. Check the plugs. If they are white...lean. Check the PCV valve, is it stuck open or installed in the wrong port on the base plate...lean. All of the sneezing out the carb and exaust makes me think it is (have I said this?) lean. Do the squirt carb cleaner or WD40 or ATF along the base of the carb and where the manifold mates to the head, a change in idle says vacuum leak, however, have the heads been milled? The leak could be on the bottom in the lifter valley.

03-09-2011, 12:52 AM	#12
ItsRandy Registered User Join Date: Nov 2010 Location: Grand Terrace, Ca. Posts: 1,607	Re: Hard start & poor off-idle acceleration Sounds like it is running lean to me. Check the plugs. If they are white...lean. Check the PCV valve, is it stuck open or installed in the wrong port on the base plate...lean. All of the sneezing out the carb and exaust makes me think it is (have I said this?) lean. Do the squirt carb cleaner or WD40 or ATF along the base of the carb and where the manifold mates to the head, a change in idle says vacuum leak, however, have the heads been milled? The leak could be on the bottom in the lifter valley.