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Joined: Sep 2023
Posts: 14
Grease Monkey
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OP
Grease Monkey
Joined: Sep 2023
Posts: 14 |
Nobody give me any helpful hints or troubleshooting advice. My 1935 Chevy runs when I put a holes into a gas can perfectly fine. When I plug it back into the gas line to the gas tank it does not stay on the line is dry. I just had gas heat completely redone. They boiled it for two days and then cleaned it out. Anybody know why car will not stay on
JB
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Joined: May 2002
Posts: 6,149 Likes: 42
ChatMaster - 6,000
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ChatMaster - 6,000
Joined: May 2002
Posts: 6,149 Likes: 42 |
Is the outlet of the tank or the pipe to the fuel pump clear? An easy way to check is to pump compressed air into the pipe that connects to the fuel pump, should blow bubbles in the tank.
Tony
1938 1/2 ton Hope to drive it before I retire
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Joined: Jan 2006
Posts: 7,046 Likes: 107
Hall Monitor ChatMaster - 7,000
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Hall Monitor ChatMaster - 7,000
Joined: Jan 2006
Posts: 7,046 Likes: 107 |
It appears something is drawing a vacuum ahead of the pump that the pump can't overcome or there's a blockage behind the pump. You leave out a lot of information. Lets go in steps.
1: Is the tank properly vented? As the pump pulls gas out it must be replaced by air through a vent. Remove the gas cap and see if that fixes the issue. If so the tank vent isn't working. If not go to step 2.
2: Have you checked the outlet of the tank to make sure it's not plugged?
3: If the tank is properly vented and the outlet not plugged, put gas in the tank and remove the line from the inlet of the fuel pump. Does gas run out? If so you're clear to that point. If not the line from the tank to the pump is plugged and needs cleaned or replaced.
4: If everything is clear to the pump inlet, remove the line at the pump outlet and activate the starter motor without the key on. Does the pump squirt gas out the outlet? If not replace or rebuild the fuel pump. If so go to step 5.
5: Remove the inlet line from the carburetor and activate the starter without the key on. Does gas squirt out? If so it's a carburetor issue. If not the line from the fuel pump outlet is plugged and needs cleaned or replaced.
To sum it up. It's a process of working from known good to bad. When it makes that transition you've found the problem.
Last edited by Tiny; 12/11/23 02:28 PM.
VCCA Member 43216
Save a life, adopt a senior shelter pet.
1938 HB Business Coupe
1953 210 Sedan
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1 member likes this:
Clement |
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Joined: Dec 2007
Posts: 4,024 Likes: 99
ChatMaster - 4,000
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ChatMaster - 4,000
Joined: Dec 2007
Posts: 4,024 Likes: 99 |
Tiny’s steps are very good. Make sure you have enough gas in the tank for the fuel to flow out.
The outlet line is slightly above the bottom of the tank. That is designed to reduce the chance that any sediment in the tank goes to the engine.
If you only put a gallon or less into the tank it might not be enough.
Last edited by Rusty 37 Master; 12/13/23 07:24 PM. Reason: Spelling of name
Rusty
VCCA #44680
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Joined: Jan 2002
Posts: 1,069 Likes: 9
ChatMaster - 1,000
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ChatMaster - 1,000
Joined: Jan 2002
Posts: 1,069 Likes: 9 |
If you disconnect the carburetor inlet. Make sure the key is off or the coil wire disconnected to the distributor. Ask me how I know. Got the fire out before the fire department arrived.
1946 Chevy 3100 1/2 Ton Pickup Purchased 11/18/17 Sold 9/20
1948 Chevy Fleetmaster Coupe, Purchased 6/20/2010
1965 Chevy ll 350 Purchased Feb 2021. 3-speed Saginaw Hurst Floor Shifter 3.08 Rear End
2019 Ford Ranger Lariat Super Crew
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Joined: Jun 2018
Posts: 470 Likes: 33
Backyard Mechanic
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Backyard Mechanic
Joined: Jun 2018
Posts: 470 Likes: 33 |
Tiny has the best steps to start with. I would defiantly start by removing the gas cap and see if that fixes everything.
Other thoughts that I have run into with other engines:
When you run the gas line from the can vs from the tank is the length of the line the same. If the pump is weak it may be able to pump a few feet but not the length of the car when idling.
Are there any kinks in the line from the tank to the pump that are bypassed when going from a can?
I have found that having an old car is a constant project that is never done. I think that is a good thing. Keeps me learning new things. Having two from different eras is just a form of higher education.
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