bouncer99

I have a 2014 Octavia Combi VRS (184PS) The original CUPA motor is after 220000 kms seems to be finished Can I replace this CUPA with a CUNA? Any software problems expected or EMU reprogramming required? Any mechanical issues to be expected? Anybody out there done it?

Thanks for this Bogda. Mine is sadly quite definately welded together. Thanks for the tip about the steering rack. The good news is that I can, here in Germany, get a new DPF for 390€ and the combined DPF and CAT for 730€.

Well, I have solved many of the problems and thereby perhaps gained a new one or two! Firstly, as several of the above folk suggested the DPF does indeed seem to be the root of much evil. However fixing it is definately not easy. I obtained a new DPF, got the car up on the lift only to discover that the DPF and the Cat are welded together. It appears I mush replace both together. Next problem, how to replace the Cat and DPF. It would appear to be eithe an engine out job or a drop the entire front suspension. There does not seem to be anything like enough space to remove these items otherwise. If anybody has a suggestion I would be most gratefull. An alternative fix which I have implemented is rather controversial! I remover the exhaust pipe from the DPF and using a 10mm drill and a hammer and chisel I have removed much of the porcelain element in the DPF. Finally some exahaust gasses can pass through Much fixed. Now the motor is using considerably less than half the diesel as before, the running on of the ventilator is stopped, no more limp home mode and masses of power when I accelerate. BUT...................... Certain errors are now showing up eg. P0401 and P2002. Obviously this is only a very temporary fix but does allow me to see clearly that the investition in a new DPF is necessary this and will be made in the next few weeks. Or sooner if somebodey tell me how to do this without removing the engine!

I recently got hold of an extremely cheap 2014 Octavia Combi with 220000 km on the clock. Seemed alright when I triued it out BUT! First sign of trouble was realising that it was using 1liter of oil every 1000 kms. The diesel consuption is also very high at ca. 10Liters per 100kms. No sign of a leak or smoke at the exhaust! Managed about 2000kms and the car went into limp home mode, the orange corkscrew light came on with messages like ACC and Front Assist not available. My diagnostic found a P0299 error - new pressure regulator fitted - no improvement at all. Now apart from the high oil and diesel consumption, the limp home mode I have noticed a number of other strange happenings. There is huge pressure blowing back when I remove the oil cap or indeed the dipstick. And the motor fan always runs on when I stop the car, even if I only drove 10kms. The tickover is sometimes 750 and more often 1000 RPM. I had the car at the local VW dealer and they replaced this pressure regulator valve but are baffled as to what the causes now of my problöems are. All they can suggest is to fit a new DPF and see if that helps. My diagnostic is now telling me that the turbo is not delivering enough boost. Can anybody help me!