AIR BUBBLES...
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Laughing Gas
Joined: Jun 2004
Posts: 823
Likes: 4
From: Calais, Vermont
AIR BUBBLES...
Last year I had a problem where so many air bubbles were spewing up into the fuel pump that the float bowl wouldn't fill, and the truck would stop running for lack of gas. I have glass top on the fuel pump and glass float bowl cover, so I can see what's going on. I tightened up the line connection to the tank and the problem went away. Yesterday, I took the truck out for the first drive of the year. About an hour into the drive, the problem came back. I could not do anything to make the problem go away. I am going to try new gas line fittings this morning, but I was wondering if this problem might possibly be related to a bad fuel line in the tank. I replaced the brass float on the gas sender unit which was rotted out. I am wondering if the gas tube in the tank is rotten and that is the source of air. Is this a typical problem that affects old gas tanks? My tank in original 1953.
Cargo Master
Joined: Aug 2010
Posts: 2,927
Likes: 135
From: Houston
How hot is the engine compartment? I had similar behavior in my 53 sedan when driving across New Mexico a few years back. The fuel would boil in both the fuel pump and carburetor due to the low quality gasoline and the summer heat. I started running mid grade gas and the drive-ability issue went away. I don't know how hot it is in Vermont at the moment, but it is a possibility.
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Laughing Gas
Joined: Jun 2004
Posts: 823
Likes: 4
From: Calais, Vermont
All fixed. I replaced the connections from the metal fuel line at the tank. I still had a small amount of bubbles. I tightened up the gas line fittings at the fuel pump and (YAY for me!!!) no bubbles. You gotta love those glass float bowl covers and glass topped fuel pumps.
Elder User
Joined: Jun 2015
Posts: 791
Likes: 11
From: Louisville
I had the same issue with my same as yours truck when I first got it. I first suspected the fuel pump diaphragm being cracked as it appeared to be original. Unfortunately the bubbles remained after replacing the pump, Duh on me. Loosened and re-tightened the line to tank fitting and that issue was resolved.
I thought you were going to replace your 215 with something else and an E40D? I'm still debating on whether or not to rebuild mine to get rid of the piston slap on one cylinder. I know it'll run forever like it is but I'd like to get rid of the noise at idle.
I thought you were going to replace your 215 with something else and an E40D? I'm still debating on whether or not to rebuild mine to get rid of the piston slap on one cylinder. I know it'll run forever like it is but I'd like to get rid of the noise at idle.
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