John S's Journal
Home Page: John S
Eugene, OR, USA
| Total Posts: 182 | Latest Post: 2026-03-25 |
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...I did get back to the fuel tank issue. Yesterday I pulled the fuel pump to see why it wasn’t ticking over. There was the usual nasty varnished gas on the tank side of the pump inlet but other than that it came right out after jacking up the back end and setting the car down on jack stands. Easy enough to get to with the wheel off.
Watched a JT video to familiarize myself with the pump and then took it apart. Pulled the diaphragm out, disassembled the points and ran them across an emory board, assembled, adjusted and bench tested with a battery charger. Worked like a charm. Back into the car, battery hooked up, key on with the hose at the carbs in a bottle and...
Nothing. Tried pressurizing the tank to prime the pump. Nothing. Took the lines off and blew through from back to front. All clear. Decided that maybe I didn’t do something right so I pulled the known working pump from the other car and tried it. Ticked over just like the one that I cleaned and adjusted but still no fuel. Blew through the line on the pump inlet back to the tank. Nope. Plugged solid. Damn.
Drained the gas from the tank that I had transferred from the wrecked ‘70
back out of the tank. Popped the sender out and had a look but the intake tube with the screen runs from the driver side through a couple of baffles so nothing to see. The tank looked ok so I gave up for the evening.
Our 2 year old granddaughter is spending the week with us so not much time today. Decided to try injecting some acetone into the tank intake from the 90 degree fitting that feeds the pump. After filling the line, it really didn’t want to accept any more so I let it soak for awhile before trying to add more acetone. Hoping that the gunk was softening, I cranked up the air pressure and just held it there until lo and behold, it broke loose. I think I heard the strainer pop off and then the flow of air into the tank.sender back in, lines hooked up and finally got the fuel to pump at a good flow into the bottle up front. Job done.
To be continued.
Watched a JT video to familiarize myself with the pump and then took it apart. Pulled the diaphragm out, disassembled the points and ran them across an emory board, assembled, adjusted and bench tested with a battery charger. Worked like a charm. Back into the car, battery hooked up, key on with the hose at the carbs in a bottle and...
Nothing. Tried pressurizing the tank to prime the pump. Nothing. Took the lines off and blew through from back to front. All clear. Decided that maybe I didn’t do something right so I pulled the known working pump from the other car and tried it. Ticked over just like the one that I cleaned and adjusted but still no fuel. Blew through the line on the pump inlet back to the tank. Nope. Plugged solid. Damn.
Drained the gas from the tank that I had transferred from the wrecked ‘70
back out of the tank. Popped the sender out and had a look but the intake tube with the screen runs from the driver side through a couple of baffles so nothing to see. The tank looked ok so I gave up for the evening.
Our 2 year old granddaughter is spending the week with us so not much time today. Decided to try injecting some acetone into the tank intake from the 90 degree fitting that feeds the pump. After filling the line, it really didn’t want to accept any more so I let it soak for awhile before trying to add more acetone. Hoping that the gunk was softening, I cranked up the air pressure and just held it there until lo and behold, it broke loose. I think I heard the strainer pop off and then the flow of air into the tank.sender back in, lines hooked up and finally got the fuel to pump at a good flow into the bottle up front. Job done.
To be continued.
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