360 fuel pump question?
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Joined: Jan 2004
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360 fuel pump question?
Hello! I've just replaced a fuel pump on a 1968 F100 360 engine that I recently acquired.The truck has been sitting untouched for about 8 years.I pulled the fuel tank and emptied the old gas (still looked good).I've poured 10 gal. of fresh gas in the tank.The old pump was not putting any fuel out the outlet that goes to the carb. I installed a new fuel pump and still can't get any fuel pumping through it when turning the engine over.I have blew air through the line from the pump to the fuel tank and even blew straight down into the tank. All lines seem clear. Is there something that sends the fuel to the pump or does the fuel pump suck the gas all the way from the tank? Any ideas are definitely appreciated!
Post Fiend
Joined: Feb 2001
Posts: 6,624
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From: Missouri
Welcome to FTE!!!
Your fuel pump eccentric may have broken or has worn real bad. Pull the fuel pump and you can look into the timing cover with a flashlight. If you unhook the fuel line from the pump does the gas free flow? There is no feeder pump in the tank or anything.
Your fuel pump eccentric may have broken or has worn real bad. Pull the fuel pump and you can look into the timing cover with a flashlight. If you unhook the fuel line from the pump does the gas free flow? There is no feeder pump in the tank or anything.
Lead Driver
Joined: Jan 2003
Posts: 9,893
Likes: 12
From: Ohio
How are the rubber hoses?? There are two: one at the frame back under rear of cab, the other at the pump.
You may be able to BLOW thru them, but when the pump starts "sucking" they may collapse and not allow fuel to pass.
The eccentric is also a good thing to check. Might want to try "pumping" it and see if you get anything that way. That will confirm pump operation.k
Larry
You may be able to BLOW thru them, but when the pump starts "sucking" they may collapse and not allow fuel to pass.
The eccentric is also a good thing to check. Might want to try "pumping" it and see if you get anything that way. That will confirm pump operation.k
Larry
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Thanks everyone for the suggestions.My brother and I installed the new pump one night in the dark following the written instructions.I pulled it back off yesterday and saw that the pump had "in" and "out" written beside the outlets. I hate to admit it,but we had the hoses connected backwards! Oh well,now I've found a new problem, but I'll start a new thread for it.Thanks again everyone.
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