Hi guys,
My car jolts when I press the accelerator, for example when I've been coasting slightly downhill in gear, then go to lightly accelerate.
It's a 03 TDI 150.
I decided to start by taking a look at the throttle body
It seems to be super dirty in there, and the pipe leading into it is quite oily too. The blade when pushed gets stuck against the build up.
I have cleaned it out the best I can without removing it from the car and it doesn't get stuck 99% of the time. After taking it for a 20 min test drive, the stumbling appears to have reduced somewhere, so I think I'm looking in the right place.
I really want to remove it so that I can clean it properly, but it looks like an absolute nightmare with incredibly awkward to reach Alan keys. I've watched a few YouTube videos of people removing them on other Mk4 TDI models, bit it seems it's a lot more awkward on the 150. Does anyknow know the best way to do this?
Is there anything else I should be looking at too?
I also have black smoke under acceleration, but I think that is the injectors.
(attempting to upload photos now)