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Old 04-30-2007, 06:47 AM
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Holley problems help!

i recently bought a holley 1805 650 cmf carb for my 68 chevy PU. I installed it last night along with an edelbrock performer intake, but i ran into problems at the end when I tried to start her back up. whenever it turns over a few time, the carb spits gas out of the top fuel bowl where the air cleaner is. anyone know what might be my problem? this is driving me crazy.
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Old 04-30-2007, 10:50 AM
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Quote:
Originally Posted by gtipton
i recently bought a holley 1805 650 cmf carb for my 68 chevy PU. I installed it last night along with an edelbrock performer intake, but i ran into problems at the end when I tried to start her back up. whenever it turns over a few time, the carb spits gas out of the top fuel bowl where the air cleaner is. anyone know what might be my problem? this is driving me crazy.
You may have a float stuck, or some foreign object caught between the needle and seat, how much thread tape did you use on the fittings ( )
Is it coming out of the little vent tube or the venturi's? If its the venturi's you probably got it 180 degrees out of time, which is easy to do.
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Old 04-30-2007, 01:06 PM
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it is coming out of the float bowl vent on the top, from under where the air cleaner would be. would vacuum lines hooked into the wrong places cause it? im stressing hard about this. i though i hooked everything up correctly. how do I unstick the float? or where do I check for a wedged object? I didnt use any thread tape on the fittings. im a newb.
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Old 04-30-2007, 01:58 PM
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i have never been into a car carburator.. but i've taken down countless fourwheeler/small engine carbs..

if your float is stuck.. take your carb out.. and where the float is.. it has a pin and a needle .. move the float enough to free it up.. and give it a little lube..

but make sure its moving.. and if something is wedged in tehre it will be inbetween the float and the carb body..making the float stick down.. so its letting more gas in and it wont float to the top to stop it..

-my 2 cents worth
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Old 04-30-2007, 02:51 PM
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Quote:
Originally Posted by gtipton
it is coming out of the float bowl vent on the top, from under where the air cleaner would be. would vacuum lines hooked into the wrong places cause it? im stressing hard about this. i though i hooked everything up correctly. how do I unstick the float? or where do I check for a wedged object? I didnt use any thread tape on the fittings. im a newb.
Try this; take out one of the bottom fuel bowl screws and drain the bowl, replace the screw and see if it floods again, this will let the fuel wash any small thing that may be wedged between needle and seat. Also while you got it drained loosen the float adjusting screw while holding the nut that it is centered in ; with screw loose take the nut 1/2 t 3/4 turn clockwise, this will lower float level, then snug the set screw.

If this cures the problem, you will need to set the float level, by taking out the little brass screw located on the side of the float bowl and raise or lower the level with the afore mentioned nut ( clockwise on the nut lowers the level counterclockwise raise the level) so the fuel just barely starts to trickle out of the hole.
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Old 04-30-2007, 04:16 PM
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okay. seriously, thanks a bunch for the help. im going to go give it a try momentarily. ill take some pics. i dont even know if you can post pics in these forums.
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Old 04-30-2007, 04:45 PM
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You may need to adjust the floats. Holleys have externally adjustable floats. There are several threads here and numerous places on the internet that can explain how to accomplish this
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Old 04-30-2007, 05:38 PM
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adjusting the floats wouldnt be as work intensive? lol, i think you can tell that I havent worked with many carburetors.
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Old 04-30-2007, 06:03 PM
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did you try advancing your timing a bit.
you had to take the distributor out when you changed the intake so maybe the timing is out.
i know it will pop and fart if the timing is off.
try turning the dist a bit and see what happens.
good luck let us know what happens.
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Old 04-30-2007, 06:05 PM
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Taking the bowl off a Holley takes 5 minutes............Do it and see if the needle and seat have dirt in them.
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Old 04-30-2007, 06:07 PM
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ya i did mess with the distributor, and I tried to mark where it was at but who knows how close I got. i will try. im about to walk out and go work on it now. im not exactly sure where to adjust the floats at, but im going to just start messing with stuff i guess.
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Old 04-30-2007, 06:13 PM
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here is a link to float adjustment.
Float Adjustment
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Old 04-30-2007, 06:14 PM
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Ignition timing will not cause fuel to pour out of the bowl vents.
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Old 04-30-2007, 06:39 PM
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thanks that will help tremendously. i cant get the secondary fuel bowl off. i though it was only the 4 bolts.

edit: ya i definatly cant get the fuel bowl off. anyone know the 1850 model and how to get it off? i thought it was only 4 bolts. i dont want to pry and mess it up.

Last edited by gtipton; 04-30-2007 at 06:52 PM.
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Old 04-30-2007, 08:31 PM
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Gasket is probably stuck, yo can take the nedle and seat out through the adjustment hole without taking anything apart I beleive.
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