Holley Experts Check In Here
Thread Starter
Safety Car
Joined: Apr 2004
Posts: 3,997
Likes: 1
From: WAY DEEP INSIDE AMERICO,YES YOU LIVE HERE TO!! TX
Holley Experts Check In Here
My almost new 600 cfm vac, sec, is puking gas
from the top already. wont idel for long, and will stay running
at 3800 rpm only. I only have 300 miles on it.
whats sticking? my float, some kind of valve. thanks
from the top already. wont idel for long, and will stay running
at 3800 rpm only. I only have 300 miles on it.
whats sticking? my float, some kind of valve. thanks
Race Director
Joined: Feb 1999
Posts: 16,978
Likes: 7
From: In Dreams There Is Truth Ohio
Originally Posted by MEGLADON
So now i have to rebuild it
Is there a simple solution
Is there a simple solution
If you have center hung floats, you don't even have to take the bowls off..unscrew the needle and seat and replace.
Thread Starter
Safety Car
Joined: Apr 2004
Posts: 3,997
Likes: 1
From: WAY DEEP INSIDE AMERICO,YES YOU LIVE HERE TO!! TX
Originally Posted by GDaina
just remove the fuel bowls and replace the needla and seat
If you have center hung floats, you don't even have to take the bowls off..unscrew the needle and seat and replace.
If you have center hung floats, you don't even have to take the bowls off..unscrew the needle and seat and replace.
of the bowl.
Race Director
Joined: Feb 1999
Posts: 16,978
Likes: 7
From: In Dreams There Is Truth Ohio
Originally Posted by MEGLADON
Is that the screw with the thin nut under it on top
of the bowl.
of the bowl.
Le Mans Master
Joined: Oct 2000
Posts: 8,897
Likes: 1,357
From: Santa Ana CA
May just be as easy as adjusting the float level. Before you disassemble anything remove the sight plugs and check the level. With the car idling, fuel should just be BARELY DRIPPLING out the holes. If you get a nice steady stream of gas, you're set too high, and gas can and will puke out as you describe.
If the level is not correct, loosen the screw/bolt on the top of the float bowls and adjust the floats so it barely dribbles out.
If the level is not correct, loosen the screw/bolt on the top of the float bowls and adjust the floats so it barely dribbles out.
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Melting Slicks
Joined: May 2002
Posts: 2,717
Likes: 121
From: Sulphur LA
St. Jude Donor '05-'06,'11,'13-'14,'16,'18,'19,'24, '25
You might want to see if the carb has an inlet filter. If not, you may want to add one. Also I am not sure if the 600 has a view port on the side of the bowl to adjust the fuel level but if it does you may want to remove the plug and crank the car and watch the hole to see if fuel flows out. The level should be set to the bottom of the whole. A little fuel may drip out of the view port but it should not run out. If it does run out it is flooding. My experience with holly carbs is they will not tolerate much trash in the needle and seat area.
I am no expert; this is just my experience with Holley carbs.
Neal
I am no expert; this is just my experience with Holley carbs.
Neal
Thread Starter
Safety Car
Joined: Apr 2004
Posts: 3,997
Likes: 1
From: WAY DEEP INSIDE AMERICO,YES YOU LIVE HERE TO!! TX
I have no sight glass, just the little screws.
I will try opening one today and see if gas rushes out.
I did the tap on the top, and it worked for about 3 minutes lol.
I will see if i can adjust it before I go buy the needle and seat.
It really must be trash, it has only the internal filter, no external.
I just put a new 305 in my 82 4x4. It has not run since 2000.
so there has to be junk in the carb, from the tank
I will try opening one today and see if gas rushes out.
I did the tap on the top, and it worked for about 3 minutes lol.
I will see if i can adjust it before I go buy the needle and seat.
It really must be trash, it has only the internal filter, no external.
I just put a new 305 in my 82 4x4. It has not run since 2000.
so there has to be junk in the carb, from the tank
Safety Car
Joined: Oct 1999
Posts: 4,101
Likes: 10
From: NorCal
It sounds like debris is getting in the needle and seat. Make sure it has a good filter, pull the needle and seat assembly to clear it (note the position/adjustment of the seat before you unscrew it), then pull the sight plug and adjust it. Word of warning! You are dealing with gasoline on a fiberglas car!! Many a vette has come to grief amid a fiery death due to carelessness. Keep the gas cleaned up, use tons of ventilation (outside is good) and keep an extinguisher handy. Not trying to scare you, just take it slow and be careful.
Hans
Hans
Melting Slicks
Joined: May 2002
Posts: 2,717
Likes: 121
From: Sulphur LA
St. Jude Donor '05-'06,'11,'13-'14,'16,'18,'19,'24, '25
They make some clear plugs to replace the brass plugs in the fuel bowl so you can see the fuel level without removing the plugs. You should be able to get them at the local auto parts store.
Thread Starter
Safety Car
Joined: Apr 2004
Posts: 3,997
Likes: 1
From: WAY DEEP INSIDE AMERICO,YES YOU LIVE HERE TO!! TX
I would like to thank everyone who helped here 
When i pulled the float out, it had a tiny piece of trash in it.
Its amazing,the trouble it caused. I put a inline filter in also.
this was on my 82 GMC 4x4.
When i pulled the float out, it had a tiny piece of trash in it.
Its amazing,the trouble it caused. I put a inline filter in also.
this was on my 82 GMC 4x4.
Last edited by MEGLADON; Jul 22, 2004 at 03:01 PM.