Need help on my 750 holley

Posted By: Dons Dart

Need help on my 750 holley - 01/31/14 10:49 PM

Its a 3310-2 V S 750 on my mild 360 I have rebuilt it in the fall just me i know what i am doing but this has me stump,i am hopping maybe someone has ran in this problim and can help befor i chuck it.Here is what it is doing,flooding the rear secondaries its not coming out the boosters but it looks like it coming from the transfer slot, i have check to see if the float is sinking its not,when it running all is find i don't see any gas pouring out the boosters ,when i shut it down it stats to flood,in the rear only its done it from day one after the rebuilt any thoughts.I have check the needle and seat but nothing HELP.

Posted By: Andrewh

Re: Need help on my 750 holley - 01/31/14 11:06 PM

where do you have the secondary' floats set to?
dribble out the sight hole, or must shake the car to get fuel out?

what pump do you have on it?
residual fuel pressure pushing it past the seat?

Is it level in the car?
I seem to recall someone having an intake that tipped it at an angle?

Posted By: Dons Dart

Re: Need help on my 750 holley - 01/31/14 11:23 PM

Quote:

where do you have the secondary' floats set to?
dribble out the sight hole, or must shake the car to get fuel out?

what pump do you have on it?
residual fuel pressure pushing it past the seat?

Is it level in the car?
I seem to recall someone having an intake that tipped it at an angle?

float is set to were i just push down on the fender and it dribbles out,have a stock pump,intake is the ld340 if it were the pump should it do the same to the front bowl.

Posted By: Andrewh

Re: Need help on my 750 holley - 01/31/14 11:24 PM

would think that, but could be something slightly different about the back that lets it bleed off first.

not saying that is it, just asking questions.

Posted By: Dons Dart

Re: Need help on my 750 holley - 01/31/14 11:40 PM

Quote:

would think that, but could be something slightly different about the back that lets it bleed off first.

not saying that is it, just asking questions.

I have no clue this is a first time for me.

Posted By: RapidRobert

Re: Need help on my 750 holley - 01/31/14 11:50 PM

Quote:

when i shut it down it stats to flood,in the rear only its done it from day one after the rebuilt any thoughts.

I'd install a new needle/seat assy. The current one might be defective even tho it was new

Posted By: TJP

Re: Need help on my 750 holley - 02/01/14 12:27 AM

Wrong gaskets, metering block /plate ????

Posted By: 383man

Re: Need help on my 750 holley - 02/01/14 12:29 AM

It almost sounds to me like a siphoning effect. Maybe an air bleed clogged in the secondary idle system and when you shut it off it keeps siphoning the fuel out. I have heard this before but never actually seen it. Ron

Posted By: 80fbody

Re: Need help on my 750 holley - 02/01/14 12:43 AM

Since you rebuilt it, I'd look at the base plate & gasket. They do warp & leak. I run a large flat file across both the main body & plate surface until even color change. Inspecting the gasket can sometimes lead to the bad area.

Posted By: Dons Dart

Re: Need help on my 750 holley - 02/01/14 02:01 AM

Thanks gang will try a few things.

Posted By: Dons Dart

Re: Need help on my 750 holley - 02/02/14 08:14 PM

Quote:

It almost sounds to me like a siphoning effect. Maybe an air bleed clogged in the secondary idle system and when you shut it off it keeps siphoning the fuel out. I have heard this before but never actually seen it. Ron

I found 1 air bleed a little gumed up thanks.

Posted By: RapidRobert

Re: Need help on my 750 holley - 02/02/14 09:02 PM

Quote:

I found 1 air bleed a little gumed up thanks.

All good now or still searching