Running rich/stumbling after replacing spark plugs

Interesting. I thought it would have started running rich immediately after the backfire, not months later. Regardless, it would have taken me forever to guess that on my own, so thank all of you very much! It would be much more difficult for a young hooligan like me to pick up this hobby if it wasn't for this awesome community. I most likely won't be able to
Interesting. I thought it would have started running rich immediately after the backfire, not months later. Regardless, it would have taken me forever to guess that on my own, so thank all of you very much! It would be much more difficult for a young hooligan like me to pick up this hobby if it wasn't for this awesome community. I most likely won't be able to check the PV until tomorrow afternoon, but I will definitely post an update once I do.
Hold the phone... I just reread your post. Newer Holley's have power valve blow out protection(a spring loaded checkball on the carb throttle plate). I'd double check all the obvious stuff and follow up with the suggestions from the other guys before you replace the PV.
check the PV until tomorrow afternoon, but I will definitely post an update once I do.