fuel ???? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

DBear · 03-19-2010, 12:32 AM

I have a 71 burb, and have not started it since Nov. '08...bout to start it up this weekend and wanted to know if the gas that was in it the last time I started it would be ok to crank it over with. didnt wanna have drop tank if all possible. can I add something to it or add new gas with the old??? thought maybe there was something to add???

rwgregory · 03-19-2010, 01:05 AM

Take off the gas cap and stick your nose in the tank. If it smells like dirty sweat socks, drain the tank. After this amount of time you may have water seperation or the gas may have started to turn to varnish. Either way, it's probably not something you want to run thru your engine. However, if you enjoy changing fuel filters, flushing fuel lines and rebuilding carburators, let 'er rip!

cdowns · 03-19-2010, 06:31 AM

i'd just add a bit of new hitest to it and run it// if there were no fuel issues b4 there should b no problem// it might not run great but wont do any harm it will run better once the old is run thru and your running on new gas

sundin · 03-19-2010, 09:57 AM

Try adding sea foam gas additive. Most parts stores have it

Shyguy · 03-19-2010, 05:23 PM

Way back in the '70's I had a '72 GMC with a 350. I use to put unused pre-mixed gasoline in it, of course usually no more than a gallon of mixed gasoline to a tank of gasoline.

It never hurt it and it ran fine.

Sea Foam is a great additive, I use it when I first start driving a truck, it helps clean out all the junk in the fuel system.

Danny

southbounddee · 03-19-2010, 06:34 PM

mix some good gas to it,..it ain't gonna hurt anything to start it,run it,what ever it,..it just might smoke a little and run a little rougher than it did, and when you feel you are good, it wouldn't hurt to change your fuel filter,..you'll be all right.

Sinister · 03-19-2010, 06:46 PM

I would siphon the tank. I've had gas go bad in under a year. Drove me nuts cause the truck wouldn't start. Tried adding good gas to it as well.

hayhauler71 · 03-19-2010, 09:28 PM

Quote:

Originally Posted by Sinister

I would siphon the tank. I've had gas go bad in under a year. Drove me nuts cause the truck wouldn't start. Tried adding good gas to it as well.

x2 on this it's just not worth plugging up your filters and gumming up your carb and fuel pump.

03-19-2010, 12:32 AM	#1
DBear Registered User Join Date: Nov 2008 Location: Rowlett, TX Posts: 865	fuel ???? I have a 71 burb, and have not started it since Nov. '08...bout to start it up this weekend and wanted to know if the gas that was in it the last time I started it would be ok to crank it over with. didnt wanna have drop tank if all possible. can I add something to it or add new gas with the old??? thought maybe there was something to add???

03-19-2010, 01:05 AM	#2
rwgregory Registered User Join Date: Apr 2005 Location: Chula Vista, California Posts: 495	Re: fuel ???? Take off the gas cap and stick your nose in the tank. If it smells like dirty sweat socks, drain the tank. After this amount of time you may have water seperation or the gas may have started to turn to varnish. Either way, it's probably not something you want to run thru your engine. However, if you enjoy changing fuel filters, flushing fuel lines and rebuilding carburators, let 'er rip! __________________ rwgregory 67 GMC 2500 ,2w/d wide box 305 V-6, 4-speed

03-19-2010, 06:31 AM	#3
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: fuel ???? i'd just add a bit of new hitest to it and run it// if there were no fuel issues b4 there should b no problem// it might not run great but wont do any harm it will run better once the old is run thru and your running on new gas __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

03-19-2010, 09:57 AM	#4
sundin Registered User Join Date: Jun 2007 Location: n.huntingdon pa Posts: 25	Re: fuel ???? Try adding sea foam gas additive. Most parts stores have it

03-19-2010, 05:23 PM	#5
Shyguy Junior Member Join Date: Dec 2006 Location: Southeast Missouri Posts: 2,436	Re: fuel ???? Way back in the '70's I had a '72 GMC with a 350. I use to put unused pre-mixed gasoline in it, of course usually no more than a gallon of mixed gasoline to a tank of gasoline. It never hurt it and it ran fine. Sea Foam is a great additive, I use it when I first start driving a truck, it helps clean out all the junk in the fuel system. Danny __________________ '67 Chevy C-20 short stepper - build complete, 454/SM-465. '75 C-30 Single Cab DRW-350 small block/NP-435. '77 GMC-6500 Dump Truck, 427 Tall Deck. '92 GMC K-3500 Duallie, 454/4L80E.

03-19-2010, 06:34 PM	#6
southbounddee Registered User Join Date: Feb 2010 Location: Gainesville, fl Posts: 187	Re: fuel ???? mix some good gas to it,..it ain't gonna hurt anything to start it,run it,what ever it,..it just might smoke a little and run a little rougher than it did, and when you feel you are good, it wouldn't hurt to change your fuel filter,..you'll be all right. __________________ http://67-72chevytrucks.com/vboard/s...d.php?t=385860

03-19-2010, 06:46 PM	#7
Sinister Between Trucks... Join Date: Mar 2002 Location: Los Angeles, CA. Posts: 3,830	Re: fuel ???? I would siphon the tank. I've had gas go bad in under a year. Drove me nuts cause the truck wouldn't start. Tried adding good gas to it as well. __________________ Beat it to fit, Paint it to match... Last edited by Sinister; 03-19-2010 at 06:48 PM.

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