They make qualified Diesel mechanics to diagnose problems like this. Why not try one. He could save you a lot of money in a very short time.This was so much simpler,( Less Expensive), when we were about talking Mechanical pump & lines systems.
Jim,a waste gate valve is nothing but a boost regulator,it is mechanical not electrical as far as i know,no wires running to it.What it does is when the engine is under load,and the boost exceeds the turbos parameters,it by passes the boost,to the exhaust side.You won't build up boost with no load.To check if it works it should be connected to either the pressure side of the turbo or intake manifold,disconnect line from there and blow into it or use low compressed air like 10/15 psi,you should see rod from valve move.If it doesn't move take it off and try again and see if it moves,while it's off check and see where it's connected to moves,that might be frozen or binding up,should move freely .If frozen or binding hit it with Blaster or WD40 to free up,could be your problem.Back to getting this grinder back to work. I blew a turbo charger and replaced it with a used one, it ran great for a month or so then gave out, black smoke all the time. Got a new turbo and it started right up with a puff of black smoke but cleared up in a few seconds. Went to full throttle and another puff of black smoke but again cleared up in a few seconds. Took it to the job and ran it up to the stump just fine. Engaged the wheel and another puff of black smoke which cleared up again. Then I lowered the wheel to the stump and full on black smoke. This time it didn't clear up until I lifted the wheel away from the stump, then is cleared up. I think it may have also lost some rpm when I was grinding but not sure. Checked every hose and line and injectors but no change. I have another bad engine that has the same fuel injector on it that I may try next, but not sure that is the problem. Does anyone know if the waste gate should be opening when you call for more powers or under a load. I can't see the arm move or any change no matter what rpm or when the wheel is engaged. its a brand new turbo so I assume the waste gate if fine, but if it should be opening and closing, what would cause it to operate or not operate. Does the turbo or fuel pump have any electronic trigger to push more or less fuel? What triggers the waste gate and how can I test it?
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