Originally Posted by Greenwood
Originally Posted by fast68plymouth
The jetting seems kinda big for a 780 Holley.

If you have a mechanical pump, I’d could have a diaphragm that’s failing and letting fuel pass through it.

If electric, what’s the pressure set at?


Electric pump. 7-8 psi.


Drop it to 5.5 to 6psi.
Secondaries seem too rich. Check your #5;6,7,8 plugs