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#1 |
Senior Member
![]() Join Date: Nov 2012
Location: BY THE CAROLINA SEA
Posts: 920
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Never assume anything...
Today I got my 67 GMC 3500 back from the muffler shop. It was dropped off there immediately after I got it back from a month-long stay at the brake shop. I was jones-ing to work on this truck after so long a separation, so I did work on it all day.
One of the first things that I did was replace the fuel sending unit with a brand new one that I bought several years ago, but never used. When my son got home we got into the truck and drove towards the gas station, since I had noticed that the gas tank was a little low when replacing the sending unit. We did not even make it five blocks and the truck just DIED. It would not start, so I popped the hood and checked the fuel filter. Half-empty. I figured that maybe the gas level was lower than I had initially thought, so I walked back home, got my 5-gallon jerry can, and drove in my car to the gas station that we were enroute to earlier. After filling it up, then transferring most of the gas into the 67, I tried to start it again. Again, no gas was in the fuel filter. I tried priming the carb, thinking that maybe there was a big air bubble in the gas lines, but again, no gas. I then realized that there was a blockage in the gas line somewhere, so I drove my car back home and got my tool box. Upon returning, I unhooked the fuel line from the fuel pump and gas tank, then blew air into it. It went through with no issues, so I reattached it to the sending unit, then blew air into it from the disconnected fuel pump line. I could not get any air to go through it this time. Even though that I knew that the sending unit was in new condition, I checked it anyway. With the fuel line detached from it I tried to blow air into the sending unit tube. It was totally BLOCKED, and I have no idea how this happened. So I drove back home yet again, grabbed the old sending unit, and upon returning to the 67, installed it back into the gas tank. This time the truck started. Today I learned never to assume that a new part is good, but I still have absolutely NO idea why it was clogged. I tried to unclog it with a piece of stiff wire, but only succeeded in getting a little air to hiss through it. I was wondering if anyone else on here had even encountered a problem like this?
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FRANKENTRUCK 1981 Chevrolet C10 Shortbed Stepside GRANDTRUCK 1968 Chevrolet C10 Stepside Longbed http://67-72chevytrucks.com/vboard/s...d.php?t=584617 PROJECT JIGSAW 1967 GMC C3500 GREAT WHITE 1986 Blazer M1009 454 engine w/700R4 transmission gas conversion |
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#2 |
Registered User
![]() Join Date: Nov 2008
Location: Texarkana, TX
Posts: 443
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Re: Never assume anything...
Any mud daubers in your area?
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Brandon 63 Biscayne https://www.pro-touring.com/threads/90718-63-Biscayne 57 Chevy Truck (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=321380 72 K20 Long bed stepside (wife's) 72 K20 Long bed 396 (flip or keep...?) The latest build: http://67-72chevytrucks.com/vboard/s...76#post8438476 |
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#3 |
Senior Member
![]() Join Date: Mar 2003
Location: Colfax-California
Posts: 8,526
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Re: Never assume anything...
Length of pick-up tube connected to sender, leak in the tube?
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