Join Date: Aug 1999
Location: Ontario, Canada
Running a Holley I would venture a guess that one of the diaphrams, of the Accel pumps has ruptured and is leaking every time you mash the throttle,
Watch the base of the accel pump with the help of a mirror ( car not running) and have some body mash the throttle, you will be able to see the leak, it smells so bad because it is boiling on the hot intake, andis gone when you stop to look.
PS. One other thing does this only happen when the tank is 3/4 full or more?
If so then look at the filler pipe and area for a leak.