My JCB excavator started running bad after some fuel filter or trash in fuel line. Got it fixed but then one of the injectors stopped working. My genius employee kept working with it missing and pouring out thick black smoke. Well my mechanic sent all 4 injectors to get tested, two were bad and 2 were going bad?? I have since replaced the injectors, but when i got it back together, it would crank but now really running bad , sounds like it is missing and pouring smoke that was unused fuel so thick we couldn't breathe in there. Do i need to have the injectors racked as i was told today. ps, it was after market injectors
What engine model and what injector pump? I'm assuming the engine is a Perkins.
after market injectors is not a good way to go