10 year old gasoline - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Volvo_Matt · 07-17-2011, 12:52 PM

What kind of problems have you guys had with old gas in the tank? My truck sat for 10 years and the sending unit was clogged with rusty deposits. I replaced it and got it running. It idles just fine, but does not accelerate off the line without stalling. There is only a few gallons of gas in the tank and I suspect water, rust, and 10 year old gas is the problem.
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awbrown · 07-17-2011, 12:57 PM

If the carb also sat 10 years I would suspect that the accelerator pump in the carb is dried out , if it does not start pumping fuel the second the throttle is in motion , you will get a hesitation.. I think a carb rebuild is in order..

Surfdaddy · 07-17-2011, 01:01 PM

My truck had been sitting since about 1990 and it was full of gas. Luckly the only thing wrong was the sending unit. It wouldn't start and I had to use starting fluid to get it running and it burned really bad, used almost the whole tank just getting it running and driving around the town maybe 50-75 miles. Change the main fuel filter, put fresh gas in it and see if it gets better. I'm on the 2nd tank and it's getting better over time

Volvo_Matt · 07-17-2011, 03:37 PM

I had the carb off and in the garage that whole time, empty and dry. When I bolted it back on it took awhile to get gas out of the primary nozzle. Haven't even checked the secondaries yet.
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chad64chevy · 07-17-2011, 04:33 PM

i would just dump the gas out! i would think you would have rust in the line that can be clogging it, and replace the fuel filter! i got a l6 230 running that sat for a few years! try that first if it don't get better a carb rebuild kit is pretty cheap and not that hard to do! i agree with ambrown the carb might have dried out!!

**Corts60** · 07-17-2011, 10:58 PM

My suburban sat from 1992 until 5 months ago and I had to completely pull out and clean the fuel tank, replace the sender and fuel filter, pump and carburetor. The only things I did not replace was the lines, and I am kicking myself for not doing it because every now and then something will break loose and get clogged in the idle circuit of the carb and not allow it to idle until I clean it out. Pain in the A*S.

iehotrod · 07-17-2011, 11:23 PM

Not only dump the 10 year old gas but you will also find out that the fuel filter will have to be replaced a few times. My truck was parked since 97 until march of this year and I had to change the fuel filter like three times and replaced the carb.

07-17-2011, 12:52 PM	#1
Volvo_Matt Registered User Join Date: May 2007 Location: Hillsboro, OR Posts: 49	10 year old gasoline What kind of problems have you guys had with old gas in the tank? My truck sat for 10 years and the sending unit was clogged with rusty deposits. I replaced it and got it running. It idles just fine, but does not accelerate off the line without stalling. There is only a few gallons of gas in the tank and I suspect water, rust, and 10 year old gas is the problem. Posted via Mobile Device __________________ 1963 LWB 350 M-21 4spd comp/edelbrock/holly/LT1 1.94/1.60

07-17-2011, 12:57 PM	#2
awbrown Registered User Join Date: Aug 2009 Location: Detroit MI Posts: 1,209	Re: 10 year old gasoline If the carb also sat 10 years I would suspect that the accelerator pump in the carb is dried out , if it does not start pumping fuel the second the throttle is in motion , you will get a hesitation.. I think a carb rebuild is in order..

07-17-2011, 01:01 PM	#3
Surfdaddy Registered User Join Date: Jan 2011 Location: Newhall Ca. Posts: 463	Re: 10 year old gasoline My truck had been sitting since about 1990 and it was full of gas. Luckly the only thing wrong was the sending unit. It wouldn't start and I had to use starting fluid to get it running and it burned really bad, used almost the whole tank just getting it running and driving around the town maybe 50-75 miles. Change the main fuel filter, put fresh gas in it and see if it gets better. I'm on the 2nd tank and it's getting better over time __________________ 1961 GMC. Start date 1/20/2011 Past projects: 1958 Fleetliner 14ft Runabout 1966 Caprice 2dr 1970 VW Squareback

07-17-2011, 03:37 PM	#4
Volvo_Matt Registered User Join Date: May 2007 Location: Hillsboro, OR Posts: 49	Re: 10 year old gasoline I had the carb off and in the garage that whole time, empty and dry. When I bolted it back on it took awhile to get gas out of the primary nozzle. Haven't even checked the secondaries yet. Posted via Mobile Device __________________ 1963 LWB 350 M-21 4spd comp/edelbrock/holly/LT1 1.94/1.60

07-17-2011, 04:33 PM	#5
chad64chevy Registered User Join Date: Mar 2011 Location: tulsa,ok. Posts: 1,803	Re: 10 year old gasoline i would just dump the gas out! i would think you would have rust in the line that can be clogging it, and replace the fuel filter! i got a l6 230 running that sat for a few years! try that first if it don't get better a carb rebuild kit is pretty cheap and not that hard to do! i agree with ambrown the carb might have dried out!!

07-17-2011, 10:58 PM	#6
Corts60 Just here to tinker Join Date: Jun 2008 Location: Holland, MI Posts: 3,697	Re: 10 year old gasoline My suburban sat from 1992 until 5 months ago and I had to completely pull out and clean the fuel tank, replace the sender and fuel filter, pump and carburetor. The only things I did not replace was the lines, and I am kicking myself for not doing it because every now and then something will break loose and get clogged in the idle circuit of the carb and not allow it to idle until I clean it out. Pain in the AS. __________________ 78 C10 SWB Diesel #1* (wrecked)http://67-72chevytrucks.com/vboard/s...1978+silverado 78 C10 SWB Diesel #2 (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=650751 60 GMC Suburban (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=445526 60 GMC 1000 (sold)http://67-72chevytrucks.com/vboard/showthread.php?t=298235 67 GMC 1500 (sold) http://67-72chevytrucks.com/vboard/s...d.php?t=803695 73 Chevy C20(Daily)http://67-72chevytrucks.com/vboard/s...d.php?t=852767 86 Suburban(summer unit) http://67-72chevytrucks.com/vboard/s...d.php?t=810697 88 Suburban 4x4(sold)

07-17-2011, 11:23 PM	#7
iehotrod Registered User Join Date: Dec 2008 Location: Oak Hills, California Posts: 393	Re: 10 year old gasoline Not only dump the 10 year old gas but you will also find out that the fuel filter will have to be replaced a few times. My truck was parked since 97 until march of this year and I had to change the fuel filter like three times and replaced the carb.



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