Looses power Q's - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Mike Culpepper · 11-30-2006, 01:34 PM

My '72 started loosing power the other morning going to work,(first time ever to do this). It ran good for about 7 miles then all of a sudden bogged down, then recovered for a few seconds, then bogged down again. If I let off the pedal and coast for a second or two I could go another few seconds, then same thing. Couple of times it died on me, but I could start it up again a little later. The truck has a 350 crate engine with a Q-jet 4bbl. that's about 1 yr old. Seemed most likely a fuel filter or pump the way it was acting, but I don't have any time to work on it now so my wife had it towed to the chevy dealer(closest mechanic). They replaced the inline and Qjet filter and ran it for another 4-5 miles, and it quit again. Pulled the NEW inline filter and cut it open and it was clogged with rust and cr#p. THey said the gastank has a bunch of rust in it. THat sounds plausableto me. ANyone else had this happen to thier truck, out of the blue?

My questions: I know none of y'all can see in this tank, BUT in your experience..........If the tank IS full of rust, would I be better off just replacing the tank and sending unit, or is it worth it to try and clean the old tank out?

ANy tanks to avoid? I have looked at LMC, brothers etc.....

Any tips or tricks to replacing one of these?
THis truck is a daily driver with no short term plans to re-build the truck.
Thanks,
Mike

PanelDeland · 11-30-2006, 05:36 PM

I would replace it.If the tank is rusted that badly there may be weak spots in it.Also to steam it out and use one of the fuel tank coatings will not save you that much and there is no guarantee that you will get it all coated.One last thought,"Now is the perfect time to get the tank out of the cab!"

**Boog** · 11-30-2006, 09:49 PM

If you just have to stick with that tank you can drain it, remove it, put a length of heavy chain in it and shake and turn that tank all kinds of ways. This will break rust buildup loose and help get it out of there. Then use one of those interior tank coatings mentioned by PanelD. Unless you have access to a nicer tank.

**truckdude239** · 11-30-2006, 09:54 PM

think i would replace the tank http://www.gmcpauls.com/fuel_tank_&_related.htm has the tanks for 179 buxs

al's71gmc · 11-30-2006, 09:56 PM

Wish you were in my area, I have a good rust free tank you could have. But it can't be shipped.

RJ100 · 11-30-2006, 11:22 PM

Ihad the same problem with my 69 long bed . Dumped a box of 1/2 nuts in the tank (after removing from truck ) Then I used POR-15 metal ready and then tank coating. That was about two years ago and haven't had a problem with rust since. It will cost about $45.00 for material less nuts

Mike Culpepper · 12-01-2006, 10:23 AM

All good ideas, thanks.
I think I will go with a new tank as most everyone suggested. I wish I had the time and $ to go with a under bed tank, but I need to get this truck back on the road asap, so back in the cab I guess.
Thanks again.
Mike

11-30-2006, 01:34 PM	#1
Mike Culpepper Red Join Date: Feb 2003 Location: Llano... Texas Hill Country Posts: 448	Looses power Q's My '72 started loosing power the other morning going to work,(first time ever to do this). It ran good for about 7 miles then all of a sudden bogged down, then recovered for a few seconds, then bogged down again. If I let off the pedal and coast for a second or two I could go another few seconds, then same thing. Couple of times it died on me, but I could start it up again a little later. The truck has a 350 crate engine with a Q-jet 4bbl. that's about 1 yr old. Seemed most likely a fuel filter or pump the way it was acting, but I don't have any time to work on it now so my wife had it towed to the chevy dealer(closest mechanic). They replaced the inline and Qjet filter and ran it for another 4-5 miles, and it quit again. Pulled the NEW inline filter and cut it open and it was clogged with rust and cr#p. THey said the gastank has a bunch of rust in it. THat sounds plausableto me. ANyone else had this happen to thier truck, out of the blue? My questions: I know none of y'all can see in this tank, BUT in your experience..........If the tank IS full of rust, would I be better off just replacing the tank and sending unit, or is it worth it to try and clean the old tank out? ANy tanks to avoid? I have looked at LMC, brothers etc..... Any tips or tricks to replacing one of these? THis truck is a daily driver with no short term plans to re-build the truck. Thanks, Mike __________________ '72 Cheyenne LWB 350/350 "The sun don't shine on the same dog's ass all the time." - Catfish Hunter (commenting on why he was not able to pitch another perfect game).

11-30-2006, 05:36 PM	#2
PanelDeland I am a Referee of life. Join Date: Jun 2000 Location: Greensboro N.C. Posts: 13,992	Re: Looses power Q's I would replace it.If the tank is rusted that badly there may be weak spots in it.Also to steam it out and use one of the fuel tank coatings will not save you that much and there is no guarantee that you will get it all coated.One last thought,"Now is the perfect time to get the tank out of the cab!" __________________ The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil"

11-30-2006, 09:49 PM	#3
Boog laying low Join Date: Mar 2001 Location: Searcy, Ark. USA Posts: 13,658	Re: Looses power Q's If you just have to stick with that tank you can drain it, remove it, put a length of heavy chain in it and shake and turn that tank all kinds of ways. This will break rust buildup loose and help get it out of there. Then use one of those interior tank coatings mentioned by PanelD. Unless you have access to a nicer tank. __________________ Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross

11-30-2006, 09:54 PM	#4
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,238	Re: Looses power Q's think i would replace the tank http://www.gmcpauls.com/fuel_tank_&_related.htm has the tanks for 179 buxs __________________ David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube Last edited by truckdude239; 11-30-2006 at 09:55 PM.

11-30-2006, 09:56 PM	#5
al's71gmc 4 eyed fever Join Date: Jul 2005 Location: Eureka, Nevada Posts: 500	Re: Looses power Q's Wish you were in my area, I have a good rust free tank you could have. But it can't be shipped. __________________ 1971 GMC 2500 4x4 1972 GMC Sierra Grande 1/2 t 4x4-#1 son's truck. Recently completed resto. 4 YO daughter," Daddy, I like your truck better than Mom's." (2000 F350-ranch truck) Smart kid!!

11-30-2006, 11:22 PM	#6
RJ100 Registered User Join Date: May 2005 Location: roanoke wv Posts: 60	Re: Looses power Q's Ihad the same problem with my 69 long bed . Dumped a box of 1/2 nuts in the tank (after removing from truck ) Then I used POR-15 metal ready and then tank coating. That was about two years ago and haven't had a problem with rust since. It will cost about $45.00 for material less nuts

12-01-2006, 10:23 AM	#7
Mike Culpepper Red Join Date: Feb 2003 Location: Llano... Texas Hill Country Posts: 448	Re: Looses power Q's All good ideas, thanks. I think I will go with a new tank as most everyone suggested. I wish I had the time and $ to go with a under bed tank, but I need to get this truck back on the road asap, so back in the cab I guess. Thanks again. Mike __________________ '72 Cheyenne LWB 350/350 "The sun don't shine on the same dog's ass all the time." - Catfish Hunter (commenting on why he was not able to pitch another perfect game).



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