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11-18-2006, 02:12 PM
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#1 |
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Oilfield Trash
Join Date: Sep 2003
Location: Raymore, Sk, Canada, Earth
Posts: 3,170
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Q-jet Carb Trouble
my carb seems to automatically flood as soon as i turn off the truck, it will start fine cold, but after its warm it will not start without flooding. It also leaks fuel out of the throttle rod bushings at the base when I shut it off.
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14 Dodge 3500 Mega Cab 08 Dodge 3500 Mega Cab 87 Chev 3+3 4x4 80 GMC K10 High Sierra bone stock 70 Chevelle 350SS long term project 68 GMC 3ton Grain Truck/Garbage wagon 50 Pontiac 2 Door Coupe Project "I've got a shotgun rifle and a 4 wheel drive and a country boy can survive" Hank Jr. |
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11-18-2006, 02:13 PM
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#2 |
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Registered User
Join Date: Feb 2002
Location: Vacaville, CA
Posts: 2,745
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Re: Q-jet Carb Trouble
Leaky fuel bowl plugs and worn throttle shaft. Time for a complete rebuild.
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 70 C/10 Light Red 350/TH350, HEI, Duals w/40 series Flows, 91 seat, LED taillights 99 Pontiac S/C GTP, SLP Ram Air hood, GMPP Konis & springs 95 Neon ACR, MP PCM, AFX UDP, 3.0 CAI |
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11-18-2006, 09:09 PM
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#3 |
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"Trucks with Class"
 
Join Date: Jul 2000
Location: OLYMPIA, WA, USA
Posts: 8,159
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Re: Q-jet Carb Trouble
If it starts good cold, there is fuel in bowl so plugs are probably holding OK. May be needle & seat not holding. Carb kit may cure it.
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11-18-2006, 09:28 PM
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#4 |
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Member #1049
Join Date: Jun 2000
Location: Troy Montana
Posts: 3,940
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Re: Q-jet Carb Trouble
If it is not running rich all the time i may be possible that someone over tightened the front two bolts and warped the top of the carb.. A common problem with Q-jets, When that happens it will leak fuel into the venturis when you shut it off flooding the engine..
Here is a link to a bit of info.. http://www.quadrajetcarburetors.com/ |
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11-19-2006, 06:22 AM
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#5 |
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Senior Member
Join Date: Jul 2001
Location: Muskegon,MI,USA
Posts: 6,026
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Re: Q-jet Carb Trouble
If the float level and needle valve is ok, I would suggest replacing the float. The Q-jet floats can absorb gasoline over time making them not seal the needle valve and seat completely. When the engine is running it will burn the excess fuel but when the engine is shut off pressure from the pump will push fuel into the carb causing it to flood.
Jim |
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11-19-2006, 09:00 PM
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#6 |
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Oilfield Trash
Join Date: Sep 2003
Location: Raymore, Sk, Canada, Earth
Posts: 3,170
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Re: Q-jet Carb Trouble
forgot to mention this carb was rebuilt w/ a new float a couple of months ago, now the guy that rebuilt it has left town so i may be out of luck
__________________
14 Dodge 3500 Mega Cab 08 Dodge 3500 Mega Cab 87 Chev 3+3 4x4 80 GMC K10 High Sierra bone stock 70 Chevelle 350SS long term project 68 GMC 3ton Grain Truck/Garbage wagon 50 Pontiac 2 Door Coupe Project "I've got a shotgun rifle and a 4 wheel drive and a country boy can survive" Hank Jr. |
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