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1967 - 1972 F-100 & Larger F-Series Trucks Discuss the Bumpsides Ford Truck

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Old Sep 7, 2009 | 12:04 PM
  #1  
Hennepin's Avatar
Hennepin
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Head Scratcher

First, let me preface my issue by saying I don't know jack about mechanical devices. Prior to working on this truck, I've never done more than change oil and grease a few bearings. But this being Grandpa's truck, I've delved into it, replaced a lot of parts, and she's almost running again.

"Almost" being the reason I'm here.

The issue: she isn't getting fuel. I've replaced the fuel pump and run compressed air through the line to make sure it's not clogged, but still no joy. Gas simply isn't getting to the fuel pump, let alone the engine.

So what's next on the troubleshooting list? Is it time to take it to the shop and have a professional drop the gas tank or replace the fuel line? Any suggestions on how I can get my baby running?

Setup: 1968 Ford F100, 6 cylinder

Thanks!
-Todd
 
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Old Sep 7, 2009 | 01:01 PM
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You have to start at the tank, under the tank there is a fitting with a hose attached, if you unhook that gas should pour right out. Typically there is a rubber portion from the tank fitting to a hard fuel line, a flex piece to to speak. It's best to take the hose from the end that connects to the hard line. Clamp the hose first with a spring loaded clamp of some kind, take the hose off, see if anything comes out. It should run like a river, not dribble like a leak. If just a leak blow air back through that to the tank and you should hear bubbles.

Messing with gas is never any fun, be careful, wear gloves and eye protection, do not do anything where there is wind blowing, etc.

David
 
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Old Sep 9, 2009 | 05:36 PM
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mcdobson
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Hey Todd,
A few things, is there fuel in the fuel tank? If so, does fuel come out of the hose if you take the rubber hose off the fuel pump? If not, is there a fuel filter that maybe plugged.
When you replaced the fuel pump, did you get the arm in the correct position on the cam lobe?
 
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Old Sep 10, 2009 | 11:46 AM
  #4  
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On my 66 f100, when I replaced the fuel pump I had to prime the lines to the pump. I used a vacumn pump to get fuel to the pump, I do not like the taste of gas. It would not prime itself.
 
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Old Sep 10, 2009 | 10:17 PM
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If you blow compressed air back to the tank; make sure the filler cap is off. If you leave it on, you'll build up pressure in the tank, and when you stop blowing, it'll spray gas everywhere. I'd try unhooking the supply line at the fuel pump, then wrapping a rag around a blow-nozzle, and pressurizing the tank from the filler neck. If there is no blockage, this will prime the line. This will, at least tell you if the line is OK: not blocked or kinked.
 
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