'81 F100 help needed.
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New User
Joined: Jan 2010
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'81 F100 help needed.
I have an '81 F100 with the 300 six. I am having issue with what i assume is the fuel system somewhere. I want to start with replacing the fuel filter. But I can't seem to find the thing. What happened was while i was on the road the truck started to feel like it was missing a little, so I headed back home but i was losing engine power fast. I went from 45 to 10 miles an hour within a mile. while doing 10 I had it floored. It wasnt revving to high at all it sounded almost like it was struggling to get gas, thats why i am assuming it was a fuel issue somewhere. Please help
Laughing Gas
Joined: Feb 2010
Posts: 781
Likes: 8
From: Sanford, NC
It may be the fuel filter "sock" that is in the gas tank. They sometimes after a lot of
years get clogged and it basically really restricts or cuts off the flow of gas. This
happened some years ago on my 1981 F100 and we fixed it by taking the gas line
loose at the fuel pump and blowing compressed air thru the line which blew the "sock"
filter off the pickup and the fuel flow problem was solved. My truck was a 302 V8 and
I now change my carb fuel filter every year just to make sure. Hope this may help you.
years get clogged and it basically really restricts or cuts off the flow of gas. This
happened some years ago on my 1981 F100 and we fixed it by taking the gas line
loose at the fuel pump and blowing compressed air thru the line which blew the "sock"
filter off the pickup and the fuel flow problem was solved. My truck was a 302 V8 and
I now change my carb fuel filter every year just to make sure. Hope this may help you.
Post Fiend
Joined: Jul 2004
Posts: 8,786
Likes: 28
From: Northern California
The Factory filter is an In-line filter between the carb and the metal tube that leads from the Fuel Pump to the carb.
Motorcraft #: FG-44-B These are still avaliable from Ford, or you can use the number to cross refference other manufactures.
It's not really accessable with the air cleaner on, as the air intake to the air cleaner is right above it.
Some people put "screw in" filters, that screw into the carb itself. These are not recommended as with repeated changings it can strip the treads.
Motorcraft #: FG-44-B These are still avaliable from Ford, or you can use the number to cross refference other manufactures.
It's not really accessable with the air cleaner on, as the air intake to the air cleaner is right above it.
Some people put "screw in" filters, that screw into the carb itself. These are not recommended as with repeated changings it can strip the treads.
