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DI have a 1983 ford f250 with 6.9 diesel engine. The previous owner told me that the front fuel tank did not work; he said that he was running the truck on the front tank once and that the truck started missing and running rough like it was out of fuel. He said he swapped to the rear tank and never had the front tank looked at for repair. I had my diesel guy look at the tank and he said everything checked out fine and that it was out of fuel. He put about five gallons of diesel in it and let it run for about 30 minutes and that the truck ran great. This truck has been a great running truck until one day I was getting hay for my cattle and the was running the truck on the front tank and it started missing and stalled out like it was out of fuel. I swapped to the rear tank and the truck started but would only run for about a minute and die again. I bleed the air out of it and changed the fuel filter and the truck started and ran great for a few days. Now the truck is hard to start and when it is running it blows out a lot of white smoke that smells like burnt diesel. Once the truck is started it runs great but is very hard to start. I put new glow plugs in, new glow plug controller and new glow plug solenoid but it still will not start unless I plug in the block heater. If the block heater is plugged in it will start up very easy. Please help before I go crazy trying to figure this out of my boss (THE WIFE) makes me sell it. She already calls the truck the money pit.

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Have you looked into the injectors, or injector balance? glow plugs just preheat the cylinders before you start turning the engine over. if the injectors are dumping too much fuel it will run rich and blow black smoke, lean it will dump white smoke, same as if it has an internal coolant leak, but smell different. Ford has had problems with EGR systems on some of their diesels, being an older truck how many miles is on it? and the front fuel tank could have a bad fuel pump, pretty common for them to do what you have described. Also might want to have the timing looked at on it! It ignites off of pressure, and if the timing is off it will adversely affect the ignition of the fuel which will make for hard starts, and poor running. there is a lot that needs to be looked at to figure this one out! could be quite a few different things. Good luck!

Posted on Nov 20, 2013

Testimonial: "Thanks, I will look at the injectors. I have already priced some new ones but was wanting someones opinion before I did. Thanks a lot . I will let you know how this works out. The truck has about 150,000 miles on it."

  • josh nicholson
    josh nicholson Nov 20, 2013

    thats pretty low mileage for that old of a truck!! or has the engine been replaced already?

  • josh nicholson
    josh nicholson Nov 20, 2013

    all of the other comments could work, but being its an 83 would be REALLY hard to buy a scanner now days for it, and its not a power stroke, as they werent out yet. should be naturally aspirated unless someone put a turbo kit on it, in which case would open up a whole new can of worms altogether!!!



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Posted on Jan 02, 2017

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SOURCE: put new glow plugs in ran fine for 1 day now it wont start..

You may want to surf around on some of the powerstroke forums for detailed answers, but I know the powerstrokes use oil pressure to control the injectors so you may have some problems with the high pressure oil pump.
Again, it is just a guess. I just wanted to point you to some of the Ford Powerstroke forums which may be of much more help for you.
Good luck..

Posted on Feb 03, 2009

SOURCE: 91 F150 runs rough at low idle

If you put a scanner on it and you have no misfire codes I would be looking at either an egr valve stuck open a little or a bad Idle Air Control Valve

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SOURCE: 2000 ford super duty 7.3 diesel will not cold start

you need to have the engine coolant switch checked,since the computer relies solely on sensors,the ect tells the computer how cold or hot it is so the computer will make it a rich or lean mixture to start the engine,if it tells the computer that it is 75 degrees the computer will lean the mixture like starting a car in the winter without a choke.

Posted on Jan 06, 2010

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