Audi 2.5TDi shudder/ splutter and hesitate - HELP!!

[deanogtv]

In the last few days my A6 2.5 TDi car has developed a stutter/hesitate under acceleration and high speed cruising almost like having a large flat spot that lasts around 1/2 a second, every 2 or 3 seconds.

Most noticeably, this happens on the motorway under normal driving whereby at 2000 rpm the engine power dips then returns quickly, this was constant on my 1 hour drive home just now. There are no engine warning lights on the dash.

The problem seems to happen throughout the rev range, there is quick dip in power and in the rpm then it will gather some power to accelerate then happen again and again. If I pull away from a round about slowly the problem isnt too bad but if I were to gun it, the engine would cough and splutter untill I backed off the power.

I have done some research but can't find much regarding this same issue, has anyone got any experience with this?

I'm guessing injestors or EGR Valve or worst a bad turbo (

Any thoughts would be helpful

Thanks

DC

[Justin S]

we had a similar issue with our 2.5 tdi Audi ( w plate) and occaisionally stuttered, then the injection pump went soon after. That was a nasty bill..........not saying that is your issue, but start saving if you want a new one from Audi, it was 5 grand or something nuts, as it needed the immobiliser setting up on it, or something.

[marcus85]

Try cleaning or replacing your air mass meter. Any fault codes?

[Pete500]

Change diesel filter. Objects in fuel tank? Starting short after fuelling - water in diesel or filled with petrol...?