305E & Holley 500 trouble - The 1947 - Present Chevrolet & GMC Truck Message Board Network

GMC65Guy · 08-10-2008, 09:00 PM

I put on my holley, no issues there. It starts and runs fine idling but when i drive it somewhat putts. It is getting to much fuel and running rich/blowing black smoke/ wont go over 40 because of it.

The instructions basically say that the carb. is set at the factory and shouldnt need to be adjusted.

What should I do?

This is the carb.

http://www.holley.com/0-4412s.asp

ed2552 · 08-10-2008, 09:22 PM

Check timing, and make sure distributor, cap, rotor, (points?), plugs, and wires are all up to the challenge.

08-10-2008, 09:00 PM	#1
GMC65Guy Registered User Join Date: Jun 2008 Location: Stillwater,Oklahoma Posts: 130	305E & Holley 500 trouble I put on my holley, no issues there. It starts and runs fine idling but when i drive it somewhat putts. It is getting to much fuel and running rich/blowing black smoke/ wont go over 40 because of it. The instructions basically say that the carb. is set at the factory and shouldnt need to be adjusted. What should I do? This is the carb. http://www.holley.com/0-4412s.asp

08-10-2008, 09:22 PM	#2
ed2552 Registered User Join Date: Jan 2007 Location: Charles City IA Posts: 1,626	Re: 305E & Holley 500 trouble Check timing, and make sure distributor, cap, rotor, (points?), plugs, and wires are all up to the challenge. __________________ '67 C20, Under the Knife!, LWB, Eaton HO-52, Rear Coil Springs 72' GMC C2500, 350, TH400(?), Dana 60 '67 K10 4-spd., 305, SM465, Dana 44, 12 Bolt, RUST! '65 C60 292, 4 spd, 2 spd Rearend, 15' Grain Box, MINT! 09 Yukon Denali 82k Miles 6.2L/6A



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.