carb. problem - The 1947 - Present Chevrolet & GMC Truck Message Board Network

gafiredog · 09-13-2008, 02:55 PM

got my 83 c-10 going thanks to many of you guys. now another problem. from the begining i have had to pour a little gas in the carb. for it to start. it starts right up, and runs good. when i shut it off, and try to restart it it just spins over like its out of gas. when i pour some gas in the carb. it will start right up. and run fine. i have changed the in line fuel filter, and the one in the carb. inlet, no improvment, it still has to have gas poured in the carb. to start. i pulled the gas line off at the carb. and its getting a good stream. any ideas ?? thanks guys. Art

COMP · 09-13-2008, 03:21 PM

sounds like the accelerator pump

Thumpin455 · 09-13-2008, 03:27 PM

what kind of carb is it? If it doesnt bog when you whack the throttle it might not be the accel pump. Depends on the type of carb it is.. Qjet, Holley, or Ebrock?

SSC's76 · 09-13-2008, 03:31 PM

Kinda ann odd problem can you pump the gas a few times and get it to hit?
Like mantined an acelerator pump being bad could be a issue but that would cause some major driveablity issues. Usually some gas will stay in the carb even if you had a bad vaine in the fuel pump allowing it to bleed back out of the carb. For kicks check the fuel pump and see if it is leaking gas around the weep hole. Even if it was bleeding back to the tank through the return vaine there should be some gas in the carb unless when you shut her down and your getting a vacuum caused by a bad fuel pump.

**old Rusty C10** · 09-13-2008, 09:39 PM

is your choke operating correctly?

gafiredog · 09-13-2008, 10:49 PM

its a factory carb. a rochester 2 b. ya know, it does bog when i whack the throttle. as for the choke, i haven't let it run long enough to see if it works. but i don't think it does, i checked the wire going to the electric choke, and had no fire in in the wire. i will put a new pump in it tomorrow, and see what happens. thanks guys, oh yeah, and there is a vaccum leak i can't find, could it be comming from the fuel pump ??

**old Rusty C10** · 09-13-2008, 11:18 PM

first thing to do is to try to run down the vacuum leak.. you can use carb cleaner to see if its at the base then check the hoses then the choke is next

09-13-2008, 02:55 PM	#1
gafiredog Registered User Join Date: May 2008 Location: metro Atlanta, Ga. Posts: 196	carb. problem got my 83 c-10 going thanks to many of you guys. now another problem. from the begining i have had to pour a little gas in the carb. for it to start. it starts right up, and runs good. when i shut it off, and try to restart it it just spins over like its out of gas. when i pour some gas in the carb. it will start right up. and run fine. i have changed the in line fuel filter, and the one in the carb. inlet, no improvment, it still has to have gas poured in the carb. to start. i pulled the gas line off at the carb. and its getting a good stream. any ideas ?? thanks guys. Art __________________ Art 1975 c-10 stepper 1978 single cab dually 1987 crewcab dually 1986 crewcab single wheel 1948 anglia- (the dixie twister super gas)

09-13-2008, 03:21 PM	#2
COMP Registered User Join Date: May 2008 Location: Eville IN. Posts: 365	Re: carb. problem sounds like the accelerator pump

09-13-2008, 03:27 PM	#3
Thumpin455 My truck is an alcoholic Join Date: Nov 2007 Location: Marquette Mi Posts: 303	Re: carb. problem what kind of carb is it? If it doesnt bog when you whack the throttle it might not be the accel pump. Depends on the type of carb it is.. Qjet, Holley, or Ebrock? __________________ Too much stuff, too many projects to list everything. my 454 urged 76 swb beater

09-13-2008, 03:31 PM	#4
SSC's76 No No Join Date: Jun 2005 Location: Pueblo Colorado Posts: 1,781	Re: carb. problem Kinda ann odd problem can you pump the gas a few times and get it to hit? Like mantined an acelerator pump being bad could be a issue but that would cause some major driveablity issues. Usually some gas will stay in the carb even if you had a bad vaine in the fuel pump allowing it to bleed back out of the carb. For kicks check the fuel pump and see if it is leaking gas around the weep hole. Even if it was bleeding back to the tank through the return vaine there should be some gas in the carb unless when you shut her down and your getting a vacuum caused by a bad fuel pump. __________________ 1976 Custom Deluxe SWB Med FMB.3/4 Drop. Gen VI 454, Muncie HD 3 speed With Modified OE Hurst Shifter, 3.73 12 bolt, GMPP HO roller cam, Hooker headers, Performer intake with modified Q-jet, Accel distributor. Best 1/4 12.3 @108. Funnest run 19.84 @88 full 1/4 mile burn out. 1997 K1500 ext cab 5.7 stock except muffler

09-13-2008, 09:39 PM	#5
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,287	Re: carb. problem is your choke operating correctly? __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!

09-13-2008, 10:49 PM	#6
gafiredog Registered User Join Date: May 2008 Location: metro Atlanta, Ga. Posts: 196	Re: carb. problem its a factory carb. a rochester 2 b. ya know, it does bog when i whack the throttle. as for the choke, i haven't let it run long enough to see if it works. but i don't think it does, i checked the wire going to the electric choke, and had no fire in in the wire. i will put a new pump in it tomorrow, and see what happens. thanks guys, oh yeah, and there is a vaccum leak i can't find, could it be comming from the fuel pump ?? __________________ Art 1975 c-10 stepper 1978 single cab dually 1987 crewcab dually 1986 crewcab single wheel 1948 anglia- (the dixie twister super gas) Last edited by gafiredog; 09-13-2008 at 10:50 PM.

09-13-2008, 11:18 PM	#7
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,287	Re: carb. problem first thing to do is to try to run down the vacuum leak.. you can use carb cleaner to see if its at the base then check the hoses then the choke is next __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!



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