stumbles

[69DARTS]

360 with a 750 holley carb.
msd ignition.
at lite throttle it stumbles and I have to like leaveing a stoplight easy feather the gas.
it had a 750 demon did the same thing
and the quick fuel carb does it also
but full throttle everything is fine.
no issues
I run a holley black fuel pump electric needs no regulator
6 1/2 pounds of fuel
just need a shove in the right direction

 

[kiss]

whats your timing set at?
is vac advance hooked up?

 

[rumblefish360]

And ... a otherwise OOTB Holley? Which one? Model number ....

 

[69DARTS]

And ... a otherwise OOTB Holley? Which one? Model number ....

a 750 demon and a 750 quick fuel holley both carbs do it
kinda think it's not the carb but something else

 

[rumblefish360]

Just wondering if the carb was stock, OOTB. Needs more pump shot? Running a slight bit lean?

My last issue was lean, just a hair. Swapped metering rods to n the AVS. Presto!

 

[mullinax95]

What you described sounds like the problem I was having recently. I turned the idle mixture screws out to richen the mixture and it cured the problem. Just throwing that out there.