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U62T Mitsubishi won’t start

Discussion in 'Mitsubishi Minicab' started by Leo Ocker, May 10, 2021.

  1. Leo Ocker

    Leo Ocker New Member Supporting Member

    Hi all,
    2003 Mitsubishi Kei Truck U62T
    VIN: U62T0705423 672cc’s?
    Purchased 2013, new engine ~17,000KM since purchased.
    Street legal in Oklahoma, but primarily used on the ranch for feeding cattle, etc.
    It had set the last 4 months, as it won’t carry round hay bales.
    Replaced battery, cranks fine no start. I also have not heard anything “clicking” either. It has been suggested that the fuel pump relay is bad, but I am not sure which one it’s under the glove box.
    I also don’t know where the fuel filter/pump is located on this vehicle.
    I would appreciate any help with this problem and will answer your questions as needed.
    Thanks,
    Leo
     
  2. Live wire

    Live wire New Member

    I’m in the same boat as you. I have a 2005 and have narrowed my problem down to the same as yours. I pulled the fuel line off the injection rail and no fuel is being pumped out. I didn’t think about the relay being bad. I was told that the fuel pump was in the tank. I was thinking of dropping it and pulling it out.

    Now you got me thinking if I could test voltage going to the fuel pump before I actually pull it. I would think you could just cycle the key on and off and check voltage for the one or two second pulse. If voltage is present I would think the relay is good??? If no fuel is being pumped or no cycling of the pump, then the pump could be bad. Just a thought as I’m no mechanic, I’m a lineman by trade.
     
  3. Jigs-n-fixtures

    Jigs-n-fixtures Well-Known Member

    Check for voltage at the pump, and you can check how many amps it is drawing. And, you can check the resistance through the winding to see if it is shorted. Easiest if you have a good motor to get readings from. But, you can do quite a bit blind.
     
    Leo Ocker likes this.
  4. Leo Ocker

    Leo Ocker New Member Supporting Member

    I
     
  5. Leo Ocker

    Leo Ocker New Member Supporting Member

    I have noted and tested the relay and it appears to function appropriately. Therefore, I need to figure out where the fuel filter is. I don’t know where the filter is, but I have also heard that it’s inside the fuel tank. Seems weird that the filter would be inside the fuel tank. Stranger things have happened. Thanks again. I have bought a 450 page Manual on the U62T vehicle and hope for some insight from it. I will keep you posted on my progress.
     
  6. Jigs-n-fixtures

    Jigs-n-fixtures Well-Known Member

    Typically there is a sock filter in teh tank to block anything large en0ugh to harm the pump, and then a finer in line filter later to stop the smaller particles which can mess up the carb, or Fuel injection system.
     
    Leo Ocker likes this.
  7. Leo Ocker

    Leo Ocker New Member Supporting Member

     
  8. Leo Ocker

    Leo Ocker New Member Supporting Member

    Thanks jigs.. It seems like some thing is blocking the fuel flow. I was able to prime the fuel injector pump and the motor started immediately, until the small amount of fuel/gas was gone. I think the lack of fuel is from the tank to the injector pump. Very frustrating!
     
  9. Limestone

    Limestone Well-Known Member

    Leo,
    I had similar issues, as mine sat a long time, and was abused by my friend's grand kids,(another story), and I was able to remove the drain plug, under the bottom of the tank, draining all the remaining fuel out. It was extremely dirty, I wound up removing the tank completely, and restoring everything completely! It needed it, including new fuel lines, pump, filters, etc....The filter sock in the tank,Jigs is referring to, is a pretty common filter on older vehicles. I never was a fan of them myself, and have eliminated them on other vehicles in the past, and replaced them with a more modern, in line easy access 5 micron fuel filter! To me fuel filters should be replaced on a regular basis, especially with the junk fuel were getting today! It has eliminated a lot of potential problems, for me, on several different vehicles! There are several past post on this forum concerning fuel, and filters, for additional reference. Good Luck!
    Limestone
     
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  10. Leo Ocker

    Leo Ocker New Member Supporting Member

     
  11. Leo Ocker

    Leo Ocker New Member Supporting Member

    Thanks again Livewire for your support. A little updating never hurts/helps sometimes. $43.50 for a new relay, nothing wrong with the old one!
    We have removed the gas tank and found the so “sock” is in three pieces. There is a filter in the fuel pump housing. A new fuel pump and sock is $308.00 not including shipping and the non existing filter is ~$125.00 range??
    To top it off, I don’t have 12 volts in the wiring connector coming from the engine compartment to the fuel pump. I’m hoping it’s a fuse, but I have not had the chance to check fuses, etc.
    I hope you have had better luck with your truck and got it fixed. Thanks
     
    Last edited: Jun 16, 2021 at 8:41 AM
    Live wire likes this.
  12. Limestone

    Limestone Well-Known Member

    Well if it's a fuse, as you know, you won't get any juice at all! Nada!!! Not sure about the Mitsu's, but Maybe someone with more knowledge on these in particular, can join in. I've stated before at several times, that eliminating all the so called easy stuff, taking notes, and eventually, you'll get it! There's several post's, on the Forum, using alternative fuel pumps, and you'll not only save money, but solve the problem! I remember Jigs, solved his similar issues with a great alternative solution! Good Luck!
    Limestone
     
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  13. fmartin_gila

    fmartin_gila Active Member

    Not familiar with the fuel system you have so this may or may not be relevant. Going on personal experience here as I have a 2002 Suzuki CarryVan with EFI. These early fuel systems are rather crude by todays standards. Mine has a returnless (meaning only the pressure line going from tank unit to the fuel rail), the injector fuel rail pressure is controlled by a bypass in the tank unit. When mine lost fuel pressure, I found the sock type filter at the intake of the pump had disintegrated as you have. Some of the material had been injested by the pump and had blocked the bypass unit open and it was just dumping the fuel right back into the tank so only small amount of fuel at low pressure being pumped to the fuel rail. I replaced the pump and pressure regulator and seems to be cured. Pure luck that none of the injested sock got dumped and did not make it to the fuel rail or injectors. Don't have any gauges or meters anymore so my troubleshooting nowadays is just relying on experience.

    As I mentioned earlier, this may or may not help in your circumstance, just trying to be of some help. Good luck.

    Fred
     
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  14. Live wire

    Live wire New Member

    Leo I’ve been busy and haven’t had time to work on my minicab. I’ve been meaning to siphon the gas out of the tank and drop it. Thanks for the update and I’ll report back here when I have a go at mine.
     
  15. Leo Ocker

    Leo Ocker New Member Supporting Member

    Yes sir, I understand. We use our own Mitsubishi for Farm and Ranching, so it essential for it to be running. Livewire was “Dead on", it was the fuel pump inside the fuel tank. The fuel filter is integral into the fuel pump housing. The sock was actually a “3 piece” sock hanging off the sides of the fuel pump. The Relay wasn’t bad. It is running great now! ^Be careful when you disconnect the quick coupler on the main fuel line as they are very fragile!!
    Parts available through:
    G & R Imports 1-573-204-8342
    155 Bamboo Lane email: store@grimports.com
    Jackson, MO 63755. Your VIN NUMBER.
    Another caveat ^ don’t reuse the gas you removed as it is old and may have particulate matter in it!!
    I don’t use 10% ethanol in anything that I don’t use/drive daily.
     
    Last edited: Jun 16, 2021 at 8:51 AM

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