Ford f100 fuel problems

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Jan 11, 2015 | 06:44 AM

#16

Tedster9

Post Fiend

Joined: Apr 2002

Posts: 19,311

Likes: 97

From: Waterloo, Iowa

I've been meaning to change that one. It's fossilized.

Maybe today is the day. Here's my fool-proof plan ha ha - disconnect hard line at tank behind seat. Run engine at idle till stalled. Then change hose out, with new clamps, etc. Reconnect line at tank, start truck, check for leaks.

Actually had a similar problem. My truck would "run out" of gas at about half a tank. After screwing around with it was convinced that by process of elimination, it HAD to be a rusted out fuel pickup inside the tank. Dang, I'm smart. Except, that wasn't it. Got a nice new tank installed though. Any air leaks in the line at/or a weak fuel pump, rotted hose might do this.

Jan 12, 2015 | 01:21 PM

#17

JEFFFAFA

Hotshot

Joined: Mar 2013

Posts: 14,255

Likes: 199

From: Phoenix, Az.

Quote:

Originally Posted by 60F100

There is a short piece of rubber hose under the cab that connects the metal line from the tank to the metal line to the pump. This hose often rots with age and will get plugged. I have had this happen on several vehicles.

I had trouble with this hose also. Mine got old and it lost it's seal to the tube for the fuel pump. Just enough where it didn't leak gas externally but the fuel pump sucked air. I thought this hose was plugged but when I blew my air through the tube I heard gurgling back there under the truck. Low and behold then it leaked my air and some gas. Put on a new piece of hose and the pump primed itself.