On a Diesel engine an injector problem would be more likely to cause a misfire issue. Also most often when an injector fails or plugs it is not intermittent. I would suppose that an operator could assess when this is happening especially on a 3 cylinder engine it would become very shaky and have a lot of vibration when misfiring. If what you are experiencing is more of just a sluggish response then as others have said this is likely a fuel supply issue. Also it could be drawing air in the fuel system. One way to check for this is to slightly pressurize the fuel tank with compressed air and see if any leaks show up. This should be done carefully only using a wadded up rag to seal around an air blower and fill neck. If the tank is real full you may want to drain or siphon it down a bit or you could get a fuel shower as the pressurized air can release quickly. Also hoses can breakdown internally and plug off inside but look fine on the outside. Injector cleaning is best left to a diesel shop with the proper flushing and testing equipment.
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Today's Featured Article - 12-Volt Conversions for 4-Cylinder Ford 2000 & 4000 Tractors - by Tommy Duvall. After two summers of having to park my old 1964 model 4000 gas 4 cyl. on a hill just in case the 6 volt system, for whatever reason, would not crank her, I decided to try the 12 volt conversion. After some research of convert or not, I decided to go ahead, the main reason being that this tractor was a working tractor, not a show tractor (yet). I did keep everything I replaced for the day I do want to restore her to showroom condition.
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