Holley help

[Rex T.]

I recently rebuilt the 3815 Holley on my 1967 427-390 car and ever since the rebuild, it has been virtually impossible to start unless I pour a little gas into the carb. Got a new fuel pump on it too. It just doesn't seem to be getting that initial "squirt" from the accelerator pump. In fact, there is NO fuel being delivered by the accelerator pump. I've rebuilt several Holley 4 bbl carbs over the years, so I thought I was pretty familiar with them, but I've never experienced this problem. (yep, it does have gas in the tank, already been down that road too). I've had the carb off the engine several times, replaced the accelerator pump, all to no avail. I'm all ears for your suggestions. As always, thanks in advance for your help.
Rex NCRS #8089

[Clem Z.]

Re: Holley help

the accelerator pump well is filled by gravity from the float bowl so if there is gas in the float bowl there should be gas in the pump. make sure that the float bowl to metering body gasket has a hole for the pump curcuit. check to make sure that the check ball is in the float bowl pump well and make sure the check valve under the squirter is there and not stuck.

[Bill Clippinger]

Re: Holley help

Hmm...

I'm not the carb expert, but I'd suggest making sure that the passageway from the accelerator pump to the discharge nozzle ("squirter") is clear. Also, I think there are TWO check valves in the accelerator circuit - one in or near the pump diaphram, and one under the "squirter." I'd make sure they were installed, and installed properly. Are you getting fuel flow to the accelerator pump?

I'm sure others can give you better help. (When my carbs go out, I just yell at them a lot - seems to do the trick!)

Good luck!

[Bill Clippinger]

Re: Holley help

Augh! Clem beat me to it!

:o)

[Clem Z.]

i may be old but i ain't slow *NM*

[Karl #35089]

Pump cam? Is the pump arm moving? *NM*