Hope you had a great weekend.
I recently bought an A3 2.0 TDI 140 BKD (2005) and it is mostly great fun to drive, however, I am having teething problems with it. It has 125k on the clock and had a new cam belt about 4 years ago (80k). I have read lots of threads/discussions on here already so I know that this is widely talked about.
The problem: It seems to idle very rough and judders (like the odd misfire) around the 2500 - 3000 rpm if accelerating moderately, which means that it's jerky. If I accelerate through it and change gear above it, I don't feel it so often. It seems happen more on up hill driving, but I have discounted the clutch because of the rough idle and the fact that it does it going down hill too.
I have taken it to my local garage and they ran the VAG diagnostics and can't find any faults to do with this - although injector 3 is running slightly less than the others, I have been told that this is within tolarance:
12:34:43 Group 013: Idle Stabilization (Injection Quantity Deviation)
0.05 mg/str Injection Quantity Deviation Cyl. 1
0.05 mg/str Injection Quantity Deviation Cyl. 2
-0.54 mg/str Injection Quantity Deviation Cyl. 3
0.42 mg/str Injection Quantity Deviation Cyl. 4
I have been advised to drive a little more sportily because these engines don't appreciate pottering around - I used to drive a VW Transporter before so I wasn't used to high revs!!!
Anyway, I have changed my driving style but it still doesn't seem right to me. I have read all sorts of articles on line to do with:
- injector seating
- injector wiring loom
- cam timing - torsion settings
- EGR throttle body
- air leak
- fuel filter
- fuel pump
- DPF blockage
and really don't have an answer. I tried some injector cleaner from Halfords which didn't make any difference.I intend to try a better one just to see what happens.
I have had the IMF changed as that was faulty - jammed open - but nothing has changed regarding the juddering.
I'm hoping this something that somebody's going to say 'Ah, I know what that is...' or 'I've seen this before and its the...'
I would be grateful of any help advice.