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#1 |
Registered User
Join Date: May 2014
Location: Alexandria, Louisiana
Posts: 4
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I have been having a problem with the fuel delivery on my 72 K10 pickup with a 350ci. From what I can tell, gas is getting to the pump but not the carburetor when the problem occurs. The weird thing is that it may work for a week without a problem, but then one day it will just stop sending fuel to the carb, and may start back within 30 minutes or so of trying to crank and putting gas straight in the carb. I think it may be trash in the gas tank, because those old mechanical pumps usually either work or they don't. However when I pull the fuel line from the inlet on the pump, there is fuel coming out. It's not a ton of fuel pouring out but there is some fuel coming through the line.
Any Ideas? |
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#2 | |
Registered User
Join Date: Feb 2009
Location: southeasternfoothillsofusa
Posts: 1,557
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![]() Quote:
Hope you luck, Sam |
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#3 |
Senior Member
![]() Join Date: May 2006
Location: Philadelphia, Pa. 19454
Posts: 9,508
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Re: Intermittent Fuel Delivery Problem
I once had a japenese beetle floating in my fuel tank on my old 1969 TR6 DD, fuel level would drop just enough to suck her hard shell against the fuel line opening, but not always! Drove me nuts figuring that one out......
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Semper Fi...Uncle Sam, you da man All parts offered to help are free, unless otherwise noted Dont try this stuff in my build thread, unless you have 55 years of mechanical OTJ training SAFETY FIRST AS usual, off topic They say your mind goes second, can't remember the first Jim |
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#4 |
Registered User
Join Date: May 2014
Location: Seguin, Tx
Posts: 27
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Re: Intermittent Fuel Delivery Problem
if its a mech pump then pull the pump off and see how worn the lobe and the arm are.
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#5 |
Registered User
Join Date: May 2014
Location: Seguin, Tx
Posts: 27
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Re: Intermittent Fuel Delivery Problem
or a rubber line before the pump could be old and stupid and be getting sucked shut cutting off the fuel supply
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#6 |
Registered User
Join Date: May 2014
Location: Alexandria, Louisiana
Posts: 4
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Re: Intermittent Fuel Delivery Problem
Last night I pulled the hose from the fuel pump and there was absolutely no gas coming out. So I shot some air down the hose and it started flowing out, so I'm going to conclude that it is trash in the tank. What is the best way to clean all of it out?
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#7 |
Registered User
Join Date: May 2014
Location: Seguin, Tx
Posts: 27
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Re: Intermittent Fuel Delivery Problem
The best way, if youve got a couple extra bucks, is to pull the tank and have it hot steam cleaned and recoated. that is the best way next to replacing the tank.
the cheaper side. 5 gallon tank of naptha is about 50 bucks, pour some in, you and a buddy shake the heck out of the tank and repeat 4 more times. cheaper, baking soda or vinegar, same process as the naptha. |
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#8 |
Registered User
Join Date: May 2014
Location: Alexandria, Louisiana
Posts: 4
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Re: Intermittent Fuel Delivery Problem
Should I just replace the tank?
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#9 |
Registered User
Join Date: Feb 2009
Location: southeasternfoothillsofusa
Posts: 1,557
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If the tank is solid, and you've got patience and a helpful buddy, use the vinegar/soda technique, shake, rinse, and re-install. Personally, I lack many of those requirements and would hafta buy a new tank. The ultimate decision, of course is yours... Good luck, and congrats go to YOU on finding the problem in the 1st place!
Sam |
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#10 |
Registered User
![]() Join Date: Nov 2012
Location: Whidbey Island/Edmonds,WA
Posts: 360
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Re: Intermittent Fuel Delivery Problem
We always just took the tank out empty, put in some dishwashing liquid, couple of gallons of water and some medium sized gravel and shake it all about. Empty, rinse/repeat and if it comes out clean, you're done. Usually on an old tank it takes two or three times to get clean water coming back out.
You can get tank coatings that allow you to pour it in, tip the tank about until coated, dry and re-install.
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If I have to be on 4 wheels, It has to be a classic Chevy 1967 c10 Longbed (Hawghauler/Icy weather transport) 2003 BMW K1200GT (Rain bike) 2007 Softail Deuce (Sun bike) 2009 Ultra Classic Electra Glide (Everything else bike) |
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#11 |
laying low
![]() Join Date: Mar 2001
Location: Searcy, Ark. USA
Posts: 13,244
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Re: Intermittent Fuel Delivery Problem
Some guys just remove the tank, drop a length of chain inside and shake and roll the tank about allowing the chain to knock any scale loose. Rinse thoroughly then use one of the tank coatings available.
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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 |
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#12 |
Senior Member
![]() Join Date: Mar 2012
Location: Chesapeake, Va
Posts: 1,275
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Re: Intermittent Fuel Delivery Problem
i would take it out and , call your local radiator shop and see if they can clean it and coat the inside
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Mike 72 C-10 Cheyenne off frame resto and Upgraded to 4 wheel disk, Tilt, Dakota Digital Dash / Rear slider. 421 SBC / TH350 3000RPM Stall Progression Ignition /Holley 750 DP/3:73 gear Eaton Limited Slip unit / 2 1/2 exhaust glasspacks ![]() |
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Tags |
fuel, fuel line, fuel pump, fuel tank, gas |
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