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C-ries · 06-07-2018, 02:10 PM

I've been having a similar issue with my pickup when I changed carburetors...a friend that has been helping me said it is a vacuum leak. We sprayed around the base of the carburetor and all vacuum lines with carb/choke cleaner until we found where it was leaking. When the carb/choke cleaner is sprayed into a leak the engine would race. One other thing he did was block the top of the carburetor with his hands, instead of killing the motor it would rev up uncontrollably. Haven't had a chance this week to get the leaks (in my case the manifold to carburetor gasket) fixed and vacuum hose replaced and to try it again. I'm very interested to see what others have for input as well.

06-07-2018, 02:10 PM	#3
C-ries Registered User Join Date: Apr 2018 Location: Watertown, SD Posts: 38	Re: 350 Tuning Issue I've been having a similar issue with my pickup when I changed carburetors...a friend that has been helping me said it is a vacuum leak. We sprayed around the base of the carburetor and all vacuum lines with carb/choke cleaner until we found where it was leaking. When the carb/choke cleaner is sprayed into a leak the engine would race. One other thing he did was block the top of the carburetor with his hands, instead of killing the motor it would rev up uncontrollably. Haven't had a chance this week to get the leaks (in my case the manifold to carburetor gasket) fixed and vacuum hose replaced and to try it again. I'm very interested to see what others have for input as well.