Fuel Pump Not Sending Gas To Carb Why?? Its Not Electric Fuel Pump???? - Hot Rod Forum : Hotrodders Bulletin Board
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Old 07-06-2002, 10:18 AM
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Post Fuel Pump Not Sending Gas To Carb Why?? Its Not Electric Fuel Pump????

Still trying to get the 350 Chevy 4bbl going but can't. The damn thing turns iver and wants to start but doesn't. When I look at the carb and pump the gas the jets are not sending squat to it. No Gas at all. I primed the fuel pump and line going into the carb. On the fuel pump there are 2 lines and one line goin to the carb. I know one line hooks up for gas whats the other one?? Why is no gas being sucked into the hoses???How can I tell if the fuel pump is bad??? Please help me. Thanks Guys.
Zee

[ July 06, 2002: Message edited by: zeeman19 ]

[ July 06, 2002: Message edited by: zeeman19 ]</p>

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Old 07-06-2002, 11:38 AM
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is it a mechanical fuel pump or electric?
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Old 07-06-2002, 01:11 PM
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The best way to see if the fuel pump is bad is to disconnect the line to the carb, crank the engine over and see if fuel flows out the line. If it does the fuel pump is fine. If it does not the pump is bad or the line is plugged, check the filter
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Old 07-06-2002, 05:11 PM
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Thought I had a bad mechanical fuel pump so I installed one of those in-line clear plastic fuel filters. Then I noticed that fuel supply was barely a trickle. I replaced the pump. When I tried to fire up the new pump I wasnt getting any fuel. I was pretty confused so I just kept cranking which probably primed up the pump and now I have pleanty of fuel feeding the carb. I also once had a car with a pressure gage in the fuel line. I loved it. I plan on adding one to my 54'.

I dont know what that other hook up is. Mine only has one for in and one for out.
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Old 07-06-2002, 06:48 PM
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Talking

zeeman,

the extra line on your pump runs back to the tank as an overflow. If your engine is running, fuel pump is pumping and your float-bowl valve on the carb is closed, then the fuel gets backed up. the gas then runs back to the tank.

JB
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Old 02-13-2007, 11:15 AM
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How do you prime an electric pump?

After installing it in the car, I put a vacuum pump on the end of the line (where it attaches to the carb), and drew on it until fuel reached the end. Then I attached it to the carb.

Is there something else that needs to be done?

This is a Mallory electric. Even though I measure 12V at the pump, it isn't pumping. It is quiet (normally can hear it hum when it is working).
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Old 02-13-2007, 01:03 PM
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http://go.mrgasket.com/pdf/TS_ElecFuelPump.pdf
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Old 02-13-2007, 03:17 PM
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Quote:
Porschev;
This is a Mallory electric. Even though I measure 12V at the pump, it isn't pumping. It is quiet (normally can hear it hum when it is working).
Is there a Good Ground,..??...

If So,.... I'd say the Pump is Broken........

Btw,......
Why would you Hi-Jack a 6 year old thread,....
Instead of starting Your Own,..??...
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