I've been having trouble starting my car this summer. It will start and run for about 2-3 seconds then stall. After about 4 attempts it will start and run rough for about 2 minutes, then run ok. When I turn it off and let it sit for awhile the starting and stalling will repeat itself. Does anyone have some thoughts what might be the trouble? I took the air cleaner off and moved the throttle and gas was injected into the carb. No leaks around the outside of the carb. Its a Holley on a late model 1966 gt350. Any help will be appreciated.