Replacing an Injector 2.4 JTDm
I have a 156 SW 2.4 JTDm which chucks out a a plume of black smoke on hard acceleration and then its all clean for the rest of the journey, but just recently it has started to put out a James Bondesque smoke screen out the back. I stopped driving it immediately and set to work to discover the problem, I had the MAF out and cleaned, then the EGR followed by the MAP and still smoking. Took the turbo off and checked it spins free with no play in bearing and does not appear to be losing oil out of cold side (bit more difficult to tell if its losing oil on the hot side but oil level in car is steady)
Then decided to take off the manifold to see if smoke was from all cylinders or just one, turns out it was just no.5 making smoke. (I had previously disconnected the electrical contact to each injector but this did not change the amount of smoke) So after some gentle persuasion managed to remove the injector it was covered in crude and there was loads of muck down the hole as well and possibly the copper washer was missing. I tested the injector by plumbing it back in to the common rail but out of the engine and turned on the ignition and diesel came out from the side of the injector. I'm guessing the injector is buggered and was over fueling cylinder 5 hence the plumes of white smoke.
I will be replacing the injector soon, but do I need to tell the ecu that I have changed the injector or can I just chuck the replacement in and off I go? I have read in the forums that the injectors are coded but I have no way of talking to the ecu, is this something a local garage can do with their computer or is it a main dealer job?
Thanks for any help