Line to 4th injector went out and CEL code P0148 came on. black smoke from tail pipe nothing excessive. Cranks over, runs. new filter added Diesel Kleen and boost

Try changing the diesel filter, when old and clogged they cause bellowing black smoke

black smoke = excessive fuel = bad injector tips , low injector pressure , turbo not working properly
take the car to an accredited diesel specialist professional for a pump pressure and injector pressure test, injector calibration and tip replacement

Your injectors need cleaning.

It sounds like the crankshaft position is bad

Have your anorobic switch on the diesel checked; it most likely is clogged; also water filter can cause this

If the smoke comming from the tail pipe is black your running rich. If thats the case the entire fuel system has to be ckecked out. Injectors could be leaking, a bad pressure regulator,stuck return line ,a coolant temp sensor could be telling the ECU that the engines cold give her more gas. I don't recommend doing fuel service unless your qualified to do so for the obvious reasons.
If the smoke coming out of the tail is grayish you have a bad head gasket. If the smoke coming out of the tail is blue you have engine oil getting into the combustion chamber. keep me posted

black smoke is not enough air or excessive fuel
if turbo , the turbo is not working and boosting, injector failure
incorrect fuel in system ( petrol instead of diesel)
water in fuel will damage injector tips

THER ARE THREE COLORS OF SMOKE. WHITE IS WATER, BLUE BURNING OIL, BLACK RUNNING RICH.CHECK COOLANT LEVEL AND DO A BLOCK TEST. HOPE THIS WILL HELP YOU SOLVE YOUR PROBLEM.

if idling rough sound like air in system.and your injection pump timing is off.

assume diesel engine ? so if water was in fuel ? the engine would not run even b4 it got to engine because fuel filter would rstrict diesel due to water on filter element ? can i just say that from your symptoms ? black smoke/engine runs but poor ? the fact it is black smoke? is most due to lack of air flow to manifold remove air filter element and see if smoke clears? if element of filter has got wet ie floods? it will not allow air through? make sure there is no other restriction/s on filter inlet and outlet pipe to manifold espcially check now for any weakness on pipe to engine from filter ie when you rev up look to see if hose is sucking together due to vacuum created by revs of engine? if injectors were defect ? the smoke would be blue due to over fuel injection ie injectors not atomizing correctly ? i would suspect problem is lack of air? out of curiosity?? how did water enter fuel tank ?? if any more info you can provide it may give better idea of problem ?