Need carb guru - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Solver · 08-24-2005, 09:01 PM

My quadrajet has a problem.
I can get in and crank and crank and no fire.
if I take alittle bit of gas and dump it down the carb she fires right up and ------stays running!!!!!!! and runs fine after that
butterfly is closed when trying to start it so the choke is working. Filter is new and so is the filter in the line before the carb.
how about some suggestions. Far as I know it is a rebuilt carb.

64fleetside · 08-24-2005, 09:24 PM

Core plugs on the bottom are leaking fuel, common prob on q-jets. Pull carb, turn over, pull baseplate,epoxy all core plugs, reassemble. Brian

JimKshortstep4x4 · 08-24-2005, 09:28 PM

Is the accelerator pump shooting a good stream of gas when you pump it?

Jim

acloco · 08-24-2005, 10:01 PM

Fuel filter in backwards....you might be surprised.

walker · 08-24-2005, 11:49 PM

I vote with 64, core plugs. Just pump the accelerator and see if fuel is coming out. No gas outta the squirters is a good indication.

Solver · 08-25-2005, 04:48 PM

Jim K is the winner!!
I pulled the carb and checked the accelerator pump and the rubber was off the bottom end. swapped pump rods and now she starts!!
Thanks for all the suggestions and will have to check to see if the core plugs are leaking in the near future. At least it starts and runs now.
Thanks again
Shannon

08-24-2005, 09:01 PM	#1
Solver Registered User Join Date: May 2000 Location: Storm Lake, Ia Posts: 1,449	Need carb guru My quadrajet has a problem. I can get in and crank and crank and no fire. if I take alittle bit of gas and dump it down the carb she fires right up and ------stays running!!!!!!! and runs fine after that butterfly is closed when trying to start it so the choke is working. Filter is new and so is the filter in the line before the carb. how about some suggestions. Far as I know it is a rebuilt carb. __________________ 1972 Cheyenne Super 20 LWB-Blue 1972 Cheyenne Super 10 LWB-Black 1972 Cheyenne Super 10 LWB-Red 1972 Cheyenne Super 10 LWB-green 1972 GMC 4x4 LWB-White 1971 Cheyenne 10 LWB-Ochre 1971 Cheyenne 20 Longhorn-Copper 1971 Cheyenne 20 Longhorn-Black 1969 Custom 10 LWB-lt blue 1968 GMC 3/4 ton-green 1968 1/2 ton swb stepside-silver 1967 Chevrolet CST 10 LWB-green 1967 Chevrolet custom 20 LWB-Maroon

08-24-2005, 11:49 PM	#5
walker Registered User Join Date: Jul 2003 Location: north of Phx AZ about 30 miles Posts: 698	I vote with 64, core plugs. Just pump the accelerator and see if fuel is coming out. No gas outta the squirters is a good indication. __________________ Andy,Phx AZ '67 C-10 (Ahhh, done at last. Well there is that disk front end I want to put in and...) "23 C-Cab-sold '48 Ford 8N tractor(still working) '67 Scout(Now on the road) '70 MG B.-sold

08-25-2005, 04:48 PM	#6
Solver Registered User Join Date: May 2000 Location: Storm Lake, Ia Posts: 1,449	Jim K is the winner!! I pulled the carb and checked the accelerator pump and the rubber was off the bottom end. swapped pump rods and now she starts!! Thanks for all the suggestions and will have to check to see if the core plugs are leaking in the near future. At least it starts and runs now. Thanks again Shannon __________________ 1972 Cheyenne Super 20 LWB-Blue 1972 Cheyenne Super 10 LWB-Black 1972 Cheyenne Super 10 LWB-Red 1972 Cheyenne Super 10 LWB-green 1972 GMC 4x4 LWB-White 1971 Cheyenne 10 LWB-Ochre 1971 Cheyenne 20 Longhorn-Copper 1971 Cheyenne 20 Longhorn-Black 1969 Custom 10 LWB-lt blue 1968 GMC 3/4 ton-green 1968 1/2 ton swb stepside-silver 1967 Chevrolet CST 10 LWB-green 1967 Chevrolet custom 20 LWB-Maroon

08-24-2005, 09:24 PM	#2
64fleetside Registered User Join Date: Apr 2004 Location: arkieland Posts: 1,070	Core plugs on the bottom are leaking fuel, common prob on q-jets. Pull carb, turn over, pull baseplate,epoxy all core plugs, reassemble. Brian

08-24-2005, 09:28 PM	#3
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	Is the accelerator pump shooting a good stream of gas when you pump it? Jim

08-24-2005, 10:01 PM	#4
acloco Registered User Join Date: Apr 2004 Location: Nebraska Posts: 335	Fuel filter in backwards....you might be surprised.



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