i have seen this quite a few times
i agree with bustedknuckles about the possibility of the turbo vanes sticking . if the turbo vanes are stuck in the full boost position this will cause the turbo to over boost and the car goes in to limp mode .by going in to limpmode the engine rev's will drop to stop any engine or turbo from damage .
this has probably been caused by either faulty injectors ( which you have now changed ) faulty egr valve ( sticking ) or oil in the intercooler , so you need to clean and pressure test the intercooler and clean / replace or blank your egr valve .this will make sure it will not happen again .
ps: there should be no oil in the intercooler ( at worst a little vapour / mist of oil ) when the intercooler has enough oil in it that the turbo pressure can force it out of the intercooler and in to the inlet manifold , then on top of the piston , the engine can RUN ON its own oil (cause engine revs to go up on its own )
if when all this is done you still get the same or similar problem , then you are left with the turbo ( turbo vanes sticking ). most turbo company's now offer a repair or fully remanufactured service,
so you might get away with just changing the turbo vanes ( vnt ring ).
1/ check oil in inter cooler
2/ check egr valve
2/ check turbo / turbo vanes
hope this helps if you need any more info let me know
yes i have got a turbo business but its not open yet !
Posted on Tuesday 17th of September 2013Don't understand this? Ask a question