ok i have been playing with this damn car all week.....i have tested the to much fuel because of low vaccumm....well at idol i was watching the venturi and no gas is flowing into the carb....she doesnt detonate, does backfire a little bit...not loud at all and it is through the exhaust....but this is because she is drowning in fuel, no vaccumm leaks, i have no idea where the fuel is coming from...i have a stock 454 fuel pump....so i am not flowing to much.....i need some more ideas....i was thinking that since it is a mechanical secondary carb maybe the secondaries are stuck open at idol?.....how would i check this?....or is that not a possibility?

thanx guys