I finallly figured out why the engine blubbers and quits when i take off. way too rich. now that i am near the zone i still cant get it. the top of the engine smokes and gives off a burning smell and it blubbers and quits when i floor it but i pinch the fuel line and the idle goes way up. i have a temp gun and it read 252, too hot, but it smokes and blubbers when i richen it what is going on?