I haven't posted here in quite some time, I've been driving boring company cars for the last few years. I have recently bought an 2006 Audi A3 TDI 2.0 S-Line on 78,000 miles. It seemed a good deal at the time, it had a brand new turbo fitted, and the cambelt had just been done. I had to take it back to the garage because the engine warning light came on the week after I bought it, and there was a squealing belt sound. They had the car for four days, and said they had fixed the squealing sound, this was apparently the EGR pipe that goes to the turbo which they replaced, and the engine warning light was fixed by replacing a wiring loom, and that the fault code was something to do with the glow plugs. Anyways, the light has come back on again, and the garage don't want to know anymore. The car drives fine 20% of the time, but the other 80% seems very sluggish unless you really boot it. There doesn't seem to be any power until you get near to 4000rpm, and when you do get it to go there is sometimes a bit of black smoke. Also, I think it sounds like the exhaust is starting to blow Any ideas as to what may be causing this? I find it strange that sometimes the power is all there, others its not... I think I might take it down to a local VW Audi specialist, but I would like to have an idea of what it might be before I go! Thanks in advance for any advice!
Hi Dan, thanks for the quick response! Would this be something I could test/replace myself, or would I need to get it hooked up to a computer?
You can disconnect it and it usually smooths things out. You won't get full power but should run better. You should get it scanned really to see what faults you have. I doesn't need a garage for that tho. Anyone with vcds should be able to help.
Ok, so I disconnected the MAF sensor, and went for a short spin. I would say that it drives marginally better than it does in the bad 80% of the time, but doesn't feel like it has done in the good 20%! Would this point to the MAF sensor then?
