I bought a mk4 tdi recently with a pd100, I got it very cheap as it had a miss-fire. I guessed it was either the injector loom, buggered injector, or damaged cam. I have replaced the injector loom and checked the injectors, but the engine is still miss-firing, which leaves me to think that the cam is gone. A brand new Bilstein cam will set me back around 130 euro, but I can buy a rebuilt pd130 for around 180 euro. I want to know what the complications are when doing a pd130 swap, what parts need to be changed etc. Is the swap worth it? Or am I better off replacing the cam?