Re: 1938 Super 8 1605 - adventures with a newbie
Posted by kevinpackard On 2023/8/7 23:58:50
Kev - I had removed an existing fuel filter at the fuel tank, in front of the electric fuel pump. The concern before was that it was causing a loss of suction. I put a new one in tonight to protect the mechanical pump.
TxGoat - There is a glass sediment bowl at the mechanical pump. It looks clear from what I can see. The gas cap is a good question. I'll have to check and make sure the vent is clear. The gas tank neck was in good shape. I took a borescope down and everything was clean there. Hard to tell what's going on in the tank, but it didn't look terrible.
So tonight I removed the electric fuel pump completely. I was concerned that is was restricting flow, and I don't use it anyways. I've never needed one on my '54, so I figure it's not necessary here....assuming the fuel pump is working correctly. I replaced it with a plastic fuel filter so I could see if I'm pulling particles from the tank. And I replaced a rubber line I had missed with fresh rubber.
I replaced the fuel filter at the carb with a fresh one. I remembered that the filter I put on there a few weeks ago was the same filter I had used on my brother-in-law's car briefly (before we had found the fuel tank to be bad). There is a very high chance that the fuel filter was already clogged with debris and varnish.
Daylight ran out so I could only go up and down the gravel driveway, a distance of probably 400-500 yards. I really gave it some gas and it felt much better....no hesitation, no roughness or stumbling. And it didn't die. It's not a great test, but it's positive.
Next I want to rig up a gravity feed for gas, so I can check the fuel pressure and volume flow with the engine running.
-Kevin
Attach file:
Electric fuel pump.jpg (180.03 KB)
Clear fuel filter.jpg (173.41 KB)
TxGoat - There is a glass sediment bowl at the mechanical pump. It looks clear from what I can see. The gas cap is a good question. I'll have to check and make sure the vent is clear. The gas tank neck was in good shape. I took a borescope down and everything was clean there. Hard to tell what's going on in the tank, but it didn't look terrible.
So tonight I removed the electric fuel pump completely. I was concerned that is was restricting flow, and I don't use it anyways. I've never needed one on my '54, so I figure it's not necessary here....assuming the fuel pump is working correctly. I replaced it with a plastic fuel filter so I could see if I'm pulling particles from the tank. And I replaced a rubber line I had missed with fresh rubber.
I replaced the fuel filter at the carb with a fresh one. I remembered that the filter I put on there a few weeks ago was the same filter I had used on my brother-in-law's car briefly (before we had found the fuel tank to be bad). There is a very high chance that the fuel filter was already clogged with debris and varnish.
Daylight ran out so I could only go up and down the gravel driveway, a distance of probably 400-500 yards. I really gave it some gas and it felt much better....no hesitation, no roughness or stumbling. And it didn't die. It's not a great test, but it's positive.
Next I want to rig up a gravity feed for gas, so I can check the fuel pressure and volume flow with the engine running.
-Kevin
Attach file:
Electric fuel pump.jpg (180.03 KB) Clear fuel filter.jpg (173.41 KB)
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