Is my carb bad.. info please - The 1947 - Present Chevrolet & GMC Truck Message Board Network

tim21391 · 12-30-2008, 11:33 PM

i have been doing typical rust repair on my truck..tore it all apart thanksgiving break... syphened gas out to put in my eclipse so it wouldnt go bad... so like two weeks ago i put 5 gallons in the tank..fired her up let her run for twenty minutes shut her off..syphened the gas... then saturday (12-27) i put the tank back in put 5 more gallons of gas in..fired right up let it run for twenty minutes ran fine....then tonight i fired her up to move it to the spot to cut rockers out and it runs so horrible i have to keep my foot in the throttle or it will die... even had the foot in it for ten minutes..still didnt fix it...shot carb cleaner down carb..didnt fix it... floored it and when i let off it would die... and when i let off slowly it stays alive but it run so horrible...

tim21391 · 12-30-2008, 11:36 PM

all i know its a holley 4 barrel

Bus Ted Knuckle · 12-31-2008, 12:26 AM

your not going to solve much by spraying carb cleaner down the butterfly. Have you checked your fuel flow? Are your filters clogged?

tim21391 · 12-31-2008, 01:09 AM

oh snap.. never even thought about that..but i do know there is like 4 filters on the thing...two in the carb then two on the lines itself... ill check those next time im working on it.... not to worried about it yet since i still got lots of body work to do and its not legal to drive...just want to fix it soon tho

Psycho71 · 12-31-2008, 11:59 PM

Check the fuel level in the bowls. Might be a stuck needle and seat, and flooding the carb with fuel. If you pull the sight plug on the side of the bowl and fuel pours out, bingo. Bowl level too high, or stuck needle. Both will present themselves in the same way.

Jay

tim21391 · 01-01-2009, 03:35 PM

how do i pul the plg o nthe bowl wheres it located

Wrenchbender Ret · 01-01-2009, 05:01 PM

First look down the throat of the carb after it dies or you shut it off. If gas is running in you do have a needle valve or float problem. There is a post further down in this section called need carb help. Try my tip in there. The sight plugs are on the side of the fuel bowls. They are brass plugs with a slot. If you remove them & gas comes out it is flooding or the float level is too high. Ideally the fuel level is right at the bottom of the hole.

tim21391 · 01-03-2009, 10:57 PM

i fixed the problem...took the bowl off and moved the float or whatever back and forth put the bowl back on and she fired and ran perfect

12-30-2008, 11:33 PM	#1
tim21391 Registered User Join Date: Jul 2007 Location: Salina, Kansas Posts: 1,998	Is my carb bad.. info please i have been doing typical rust repair on my truck..tore it all apart thanksgiving break... syphened gas out to put in my eclipse so it wouldnt go bad... so like two weeks ago i put 5 gallons in the tank..fired her up let her run for twenty minutes shut her off..syphened the gas... then saturday (12-27) i put the tank back in put 5 more gallons of gas in..fired right up let it run for twenty minutes ran fine....then tonight i fired her up to move it to the spot to cut rockers out and it runs so horrible i have to keep my foot in the throttle or it will die... even had the foot in it for ten minutes..still didnt fix it...shot carb cleaner down carb..didnt fix it... floored it and when i let off it would die... and when i let off slowly it stays alive but it run so horrible... __________________ 1972 C-10...402/400..flowmaster 40 series 1967 Mustang 347 stroker/C-4 1966 Mustang 289/3-speed 2013 Mustang V6/6speed w/300 ponies I may be 23, but i sure do knows 67-72s are sexy! Its not MPG its smiles per gallon! build started 11/25/08 build thread: http://67-72chevytrucks.com/vboard/s....php?p=2993796

12-30-2008, 11:36 PM	#2
tim21391 Registered User Join Date: Jul 2007 Location: Salina, Kansas Posts: 1,998	Re: Is my carb bad.. info please all i know its a holley 4 barrel __________________ 1972 C-10...402/400..flowmaster 40 series 1967 Mustang 347 stroker/C-4 1966 Mustang 289/3-speed 2013 Mustang V6/6speed w/300 ponies I may be 23, but i sure do knows 67-72s are sexy! Its not MPG its smiles per gallon! build started 11/25/08 build thread: http://67-72chevytrucks.com/vboard/s....php?p=2993796

12-31-2008, 12:26 AM	#3
Bus Ted Knuckle Son of a gun Join Date: Jan 2007 Location: Hot Springs, Arkansas Posts: 1,636	Re: Is my carb bad.. info please your not going to solve much by spraying carb cleaner down the butterfly. Have you checked your fuel flow? Are your filters clogged? __________________ Bill BEATERS ARE NEATER

12-31-2008, 01:09 AM	#4
tim21391 Registered User Join Date: Jul 2007 Location: Salina, Kansas Posts: 1,998	Re: Is my carb bad.. info please oh snap.. never even thought about that..but i do know there is like 4 filters on the thing...two in the carb then two on the lines itself... ill check those next time im working on it.... not to worried about it yet since i still got lots of body work to do and its not legal to drive...just want to fix it soon tho __________________ 1972 C-10...402/400..flowmaster 40 series 1967 Mustang 347 stroker/C-4 1966 Mustang 289/3-speed 2013 Mustang V6/6speed w/300 ponies I may be 23, but i sure do knows 67-72s are sexy! Its not MPG its smiles per gallon! build started 11/25/08 build thread: http://67-72chevytrucks.com/vboard/s....php?p=2993796

12-31-2008, 11:59 PM	#5
Psycho71 Registered User Join Date: Jan 2006 Location: Kaufman, Tx Posts: 827	Re: Is my carb bad.. info please Check the fuel level in the bowls. Might be a stuck needle and seat, and flooding the carb with fuel. If you pull the sight plug on the side of the bowl and fuel pours out, bingo. Bowl level too high, or stuck needle. Both will present themselves in the same way. Jay __________________ You only need two tools in life - WD-40 and Duct Tape. If it doesn't move and should, use the WD-40. If it shouldn't move and does, use the duct tape. If a hammer doesn't fix it, you have an electrical problem! Slot Cars, 1:24 Scale, 100MPH@100,000RPM, fastest things on wheels!

01-01-2009, 03:35 PM	#6
tim21391 Registered User Join Date: Jul 2007 Location: Salina, Kansas Posts: 1,998	Re: Is my carb bad.. info please how do i pul the plg o nthe bowl wheres it located __________________ 1972 C-10...402/400..flowmaster 40 series 1967 Mustang 347 stroker/C-4 1966 Mustang 289/3-speed 2013 Mustang V6/6speed w/300 ponies I may be 23, but i sure do knows 67-72s are sexy! Its not MPG its smiles per gallon! build started 11/25/08 build thread: http://67-72chevytrucks.com/vboard/s....php?p=2993796

01-01-2009, 05:01 PM	#7
Wrenchbender Ret Registered User Join Date: Oct 2005 Location: Overland Park, Ks. Posts: 5,203	Re: Is my carb bad.. info please First look down the throat of the carb after it dies or you shut it off. If gas is running in you do have a needle valve or float problem. There is a post further down in this section called need carb help. Try my tip in there. The sight plugs are on the side of the fuel bowls. They are brass plugs with a slot. If you remove them & gas comes out it is flooding or the float level is too high. Ideally the fuel level is right at the bottom of the hole.

01-03-2009, 10:57 PM	#8
tim21391 Registered User Join Date: Jul 2007 Location: Salina, Kansas Posts: 1,998	Re: Is my carb bad.. info please i fixed the problem...took the bowl off and moved the float or whatever back and forth put the bowl back on and she fired and ran perfect __________________ 1972 C-10...402/400..flowmaster 40 series 1967 Mustang 347 stroker/C-4 1966 Mustang 289/3-speed 2013 Mustang V6/6speed w/300 ponies I may be 23, but i sure do knows 67-72s are sexy! Its not MPG its smiles per gallon! build started 11/25/08 build thread: http://67-72chevytrucks.com/vboard/s....php?p=2993796



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