Question about 1986 Ford F 250

2 Answers

No fuel to carburator

86 F-350, 6.9 dually diesel with dual fuel tanks. No fuel to carb, and gas gauge to both tanks has stopped working at the same time.
Also, beings that two tanks are involved, wouldn't fuel pump be mounted on frame?, (or would there be two pumps, one in each tank?)

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  • nannuu365 May 28, 2009

    Hello there FixYa,

    I'm running an 86 F-350, 6.9 One Ton Dually Diesel, and this is my story....

    One day, a couple of months ago, I went out to my truck to go to the store to buy some beer and chips. Normally I wouldn't even hear the starter cranking, just the sound of the engine as she purrs. But this particular time, although she started as usual, she purred for only a few seconds, and then choked out!
    "What is this?", I said to myself.
    "Perhaps just a fluke", I answered, as I hit the ignition switch again.
    But this time she cranked for about thirty seconds before starting.
    "Hm-m-m-m, this does not sound good", I thought.
    "Perhaps just an air bubble", I figured as I pulled into the street.
    So I went to the store, got my beer and chips, and came home without a problem.
    The next day it did the same thing and I knew something was wrong.
    This happened every time I started the truck, but once running she was fine.
    Last week, she did the same thing, but then, while sitting at a light, she started to choke. I immediately put it in neutral, (Three speed automatic transmission), pumped the fuel pedal and it cleared up. It happened again at the following light, only this time

    it choked out. After cranking the engine for what seemed to be a couple of minutes, she started and down the road I went. This happened at every light I stopped at, (four). During this time I was also switching back and forth between fuel tanks to see if that would make a difference - None. I also noticed that as this was happening the fuel tank gauge was registering empty for both tanks. (One tank was full, the other half full).
    Then as I turned onto the street where I live, she died, and after finally starting again, went about twenty - feet, and died again. From there I had to have a friend tow me home as she wouldn't start again, period.
    After getting home I popped the fuel filter off and installed a

    new one which I made sure was full of fresh fuel. I had my friend crank the ignition as I tried to bleed it at the filter using the Schrader valve. Nothing came out of the valve, not even air bubbles.
    Down in the frame on the drivers side is what looks to be the switch that controls which fuel tank is used. I had someone turn on the key while I put my hand on it. I felt nothing and heard nothing.I'm told there are three fuel pumps, one in each tank and one on the engine. ...How nice...
    I make sure that there is always a clean air filter, a clean fuel filter, and a clean oil filter. I use synthetic oil, and have 400, 000 miles on the engine. She has never been overhauled, and except for a little blue smoke, normally runs great.
    I am not a mechanic in ANY sense of the word, and so your going to have to be as detailed in your responses as possible.

    Thanking you, Niles Rodrick



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There is a mechanical fuel pump on the engine, that is a lift pump, once the fuel reaches the injection pump it is pumped up to pressure by the injection pump, also make sure u have bleed the air out of the lines, there is a bleed valve in the bottom of the fuel filter, it is common for them to leak air into the system and create a hard start and stall condition, you don't have a carburetor u have a diesel high pressure Roots style injection pump, that is the thing in the front top of engine with the eight lines coming out of it, they are a common problem as are the part numbers for the mechanical fuel pump and the injection pump. Source of part numbers is

Part #M60278 {Mechanical Fuel Pump}
No fuel to carburator - m60278_ang.jpg $38.79


Posted on May 28, 2009

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Well if ur car has no fuel to carborator then fisrt check the fuel pipe and see if there is no blockage ther. If this is fine then there is problem with ur fuel pump and it must be replaced. Get it replaced by a mechanic if u r not skilled enough to perform it.


Posted on May 28, 2009


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