ok it runs but poorly??

prestigue said
the engine is a new build, buy a pro in Denver. was full assembled when I picked it up. fires right up, without hesitation. no poping. but when you get the engine to 2500ish, it bogs really bad, and then starts poping out the carb. just went out and double checked timing, advance, cap, rotor, and adjusted points to .010. will leaning out cause the poping in the carb. I was sure it was rich mixture, but was just told that running lean will cause your eyes to burn as well. hmmmm now really stumped.

I just remembered that something like this happened to me on a 360 when I swithched to champion plugs. I'd take her for a drive for 30 minutes and then pull the plugs and see what they look like, if she's running rich they should be black and sooty and maybe even wet. You could also try going up 2 heat ranges on the plugs. Also has this engine got a EGR (exhaust gas recirculator) valve on it. If it does, and I doubt that it does, it would be on the intake manifold right behind the carb and looks like about a 3-4" mushroom head with a vacuum hose going to it.

Terry