I am still working on getting the issues on my carb swap from a Rochester to a Carter and I have found another issue I need some help with. Most of my driving is very laid back; slow speeds (about 45 tops) and easy acceleration. The other day I was going up a hill and was trying to speed up some (or at least not decelerate anymore) and I discovered that the more I opened the throttle, the worse the engine ran. As I topped the hill and backed off on the gas pedal, things smoothed back out. I did some experimenting on the rest of the drive home including really stepping on the pedal, and I had the same issues. The more you open the throttle, the worse it runs. The engine idles fine, cruises great and accelerates well when you do not ask for it too quickly. Thinking I might have a vacuum leak, I disconnected the wipers and had no change on the test drive. I read in another post about looking for vacuum leaks using carb cleaner so I gave that a try. The only thing that changed anything was when I sprayed at the area of the throttle shaft and the engine would almost die when I did that. Worse on the front side than the back.
So my question are; could the air leak at the shaft be causing this issue? Or could there be another air leak somewhere that I have not found (I checked both ends of the vacuum advance with no change)? Could the metering rod be misadjusted? I am not confident on my attempt at getting that adjusted correctly, but it seemed to be set right.
It is a Carter 2100S.
My wife asked what WOT is; wide open throttle.
Thanks for your help,
Lee.
