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  1. #1
    New Member
    Join Date
    Feb 2007

    Default Compact Diesel Power Loss

    Perchance someone can help me out with this. My Ford 1720, early 90's model with 570 hours got some bad fuel in January. I drained the tank but in the process had a great deal of difficulty getting the tractor started again. Really had trouble getting the air out of the injection pump and lines. I pulled the injectors and had them tested; they were all in spec. Finally got the air bled out of the fuel lines to the injectors and tractor was running okay again, or so I thought. I used the tractor for hauling firewoood in February/March and seemed to be normal, but lately when I have plowed, disked or mowed, I note that I don't have the power that I had previously. I have to use one or two gears lower than in the past. Today, I mowed with a rotary cutter and could barely get through grass that would have been a non event in the past. When the tractor starts to lose RPMs I notice blue smoke from the exhaust. With the tractor idling, I loosened the number one cylinder injector fuel line, and the engine started to die. Same with the second cylinder. However, when I loosened number three cylinder, diesel squirted out, but the engine did not change speed, so three cylinder is not firing. I removed number three injector from the block and will have it checked out by a diesel mechanic. Maybe plugged, but I doubt it. It seems that today the amount of power that the tractor put out became progressively worse. Please note that I have changed the fuel and air filters recently. Any ideas on what is going on here?

  2. #2
    Super Member
    Join Date
    Sep 2000

    Default Re: Compact Diesel Power Loss

    You did a great job with the diagnostics. Really spot on. Your 3 cylinder will try to die when you loosen injectors #1 or #2, but makes no change when #3 is loosened. That's a dead giveaway that injector #3 or the line is clogged.

    Call around to diesel repair shops that do injection pumps. You can probably buy a refurb injector for less than the cost of having yours done. I feel that the service you got on the injectors before was potentially lacking.


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