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07-03-2009, 05:07 PM
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#1 |
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It's all in the timing
Join Date: May 2009
Location: Lake Mary,Florida
Posts: 600
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Carb Help
Bought my truck about 2 months ago,PO was running it with no air cleaner.One of the first things I diid was rebuild the carb.Now when she sits for more than a day or 2 all of the fuel drains back down towards the tank and it is difficult to start.Its a roch 2 barrel on a sb350.Any one have an idea of what might be causing this?Thanks in advance for any input,Mike
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07-03-2009, 06:12 PM
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#2 |
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70 Chevrolet=Obsession
Join Date: Jun 2009
Location: nice ca
Posts: 1,067
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Re: Carb Help
That's very interesting. I have a Rochester Quadrajet on a 350 and it has been doing exactly the same thing for years. Otherwise it runs perfectly. I would be very interested in hearing what other members have to say about this. P.S. I have a mechanical pump.
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I'm Just like my truck. Old, Ugly and Grouchy. Except my truck starts easily in the morning and doesn't smoke! IT'S NOT EASY BEING GREEN! -Kermit the frog 1970 Chevrolet C-10 Longbed Stepside : 350, Muncie M20, 3.08 GM corp. positraction Forest green exterior/light green interior(Where all my money goes) 1996 Toyota Corolla (Parts runner) |
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07-03-2009, 10:42 PM
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#3 |
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Registered User
Join Date: Jul 2007
Location: New Castle, IN
Posts: 199
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Re: Carb Help
great question
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07-04-2009, 01:00 AM
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#4 |
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Middle-aged Curmudgeon
Join Date: Jun 2008
Location: Independence, MO
Posts: 753
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Re: Carb Help
Fuel pump might be bad. There's a check valve in it that's supposed to keep the gas up in the line. If it goes bad the gas can drain out and gradually empty the float bowl. Try a new pump and see what happens.
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Bret Check out the site's Truck Tech FAQ. Be a site supporter. My more-or-less pathetic build thread. Board members I've met: ------------------------------ Longhorn Man Dieselwrencher jholley big mike71 |
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07-04-2009, 02:17 AM
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#5 | |
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Big Red - Now its a SWB!
Join Date: Jun 2009
Location: Oroville, Ca
Posts: 1,624
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Re: Carb Help
Quote:
 that's the same thing I thought when I read this
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68 3/4 ton  (Project)-350 Small Block, .030 over, 10:1 comp, 3998993 heads, C3BX edelbrock intake, comp cams XE268, Holley 670 SA, long tube headers, dual flow 40's, E-fan, Alum rad, currently under the knife getting shortened and bagged  build thread41 3/4 ton (wife's)-flatbed, fully restored to original01 Tahoe LT 4WD (my daily driver)-Magnaflow Muffler, Rollin on 22's 02 Ford Mustang Convertable (Wife's Car)-Flowmaster 50, Clear corners, Intake, sittin on 18's |
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07-04-2009, 08:55 AM
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#6 |
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Registered User
 
Join Date: May 2006
Location: Wyman, Kentucky
Posts: 403
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Re: Carb Help
Sounds like the notorious fuel well plugs. Check out this link for a fix.
http://www.stratagaz.com/Quadrajet/Q...et_7029202.htm
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1972 GMC Jimmy, 4WD, 454 CI, 350 Turbo, 4" lift, 35" tires The math teacher said my son "Bubba" could be a mathmatical genius. cause he's got 13 fingers! |
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07-04-2009, 09:20 AM
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#7 |
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It's all in the timing
Join Date: May 2009
Location: Lake Mary,Florida
Posts: 600
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Re: Carb Help
Thanks for the great link RustyParts.Looks like I will be pulling the carb back off and breakin out the old epoxy.Thanks again.
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