1967 GTO Running rough
Hi Everyone, I have a question about how you guys would start to troubleshoot a problem I am having with my new rebuilt 400, I put in the new motor and broke it in, but it is sputtering like crazy, we took it for a drive around the block and it has a top speed of about 30mph, and is just sputtering like crazy. I'm just wondering where you guys would start, timing?, Carburetor, adjust the valves, maybe even something as simple as a vacuum leak. Any thoughts on how to get started would be great, Thanks in advance. Also do you think I need to run a pcv valve to the carburetor, right now I just have it capped off.