Fuel Pump Install
Thread Starter
Le Mans Master
Joined: Sep 2002
Posts: 5,236
Likes: 898
From: Myrtle Beach SC
Fuel Pump Install
What am I missing here? No gas is pumping after I've installed a new fuel pump. I thought at first fulcrum was not correctly positioned; removed pump only to learned it was in correct position...rod at end of fulcrum. Even showed nice clean area where grease was used in the installation to hold rod in place. Cranking has been excessive. Added two gallons in the event fuel in tank was low but still no show of gas at the top of carb fuel pipe. Right now I've just the pipe dumping into glass jar to check fuel flow.
So what am I missing here?
So what am I missing here?
Thread Starter
Le Mans Master
Joined: Sep 2002
Posts: 5,236
Likes: 898
From: Myrtle Beach SC
Race Director
Joined: Sep 2003
Posts: 16,839
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From: Database Error Indiana
I recently put a new Delco in my C3 project that was BAD. Really took me by suprise, I was looking for a carb problem, till I unhooked the fuel line and got nothing while cranking. They warranteed it and the 2nd one was good. 
Thread Starter
Le Mans Master
Joined: Sep 2002
Posts: 5,236
Likes: 898
From: Myrtle Beach SC
Had that problem before with a heater core...leaked
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From: Dayton, Ohio
Le Mans Master
Joined: May 2002
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From: Lebanon Township New Jersey
I agree with DWncchs, removing the rubber line from the tank to the pump, at the pump, should allow gas to flow by itself - use a bucket. This is assuming that the car is level, front end no higher than the back. Since you have gas in the tank, if it doesn't flow, try blowing a little compressed air back thru the line back to the tank. If your inlet sock is plugged up, this might free it up.
Thread Starter
Le Mans Master
Joined: Sep 2002
Posts: 5,236
Likes: 898
From: Myrtle Beach SC
I suspect the sock is partially blocked as well. I'll blow some air into the line to see if it unclogs it as well. This may have well been the cause of the initial low fuel flow that lead me to replacing fuel pump in the first place.
Bottom line...fuel is not free flowing from fuel line hose after siphon established.
Last edited by hunt4cleanair; Jul 18, 2007 at 06:48 AM.
Race Director
Joined: May 2006
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From: Dayton, Ohio
Used a small electric vacuum pump and got gas flowing. Hooked up hose and carb pipe and got the fuel to respond as well. Gas spurts rather than a steady stream. Same as when I was using the vacuum pump...spurted rather than a steady stream.
I suspect the sock is partially blocked as well. I'll blow some air into the line to see if it unclogs it as well. This may have well been the cause of the initial low fuel flow that lead me to replacing fuel pump in the first place.
Bottom line...fuel is not free flowing from fuel line hose after siphon established.
I suspect the sock is partially blocked as well. I'll blow some air into the line to see if it unclogs it as well. This may have well been the cause of the initial low fuel flow that lead me to replacing fuel pump in the first place.
Bottom line...fuel is not free flowing from fuel line hose after siphon established.
Remember if you blow air back into the tank with the cap on you will pressurize the tank and tons of fuel will come back out.You can also deform your tank.
Thread Starter
Le Mans Master
Joined: Sep 2002
Posts: 5,236
Likes: 898
From: Myrtle Beach SC