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deanogtv

Stutter/ hesitation on 2.5 TDi at all speeds - HELP!!!

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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 :o(

Any thoughts would be helpful

Thanks

DC

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My initial thoughts would be EGR valve, very similar symptoms to what I've had on various cars with sticking EGR valves.

I'd take it off, see if it's sticking, clean it and put it back, or, get it removed completely.

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Assuming you haven't already fixed the problem , but I had a similar issue on my petrol 4.2 A6. It turned out to be the mass airflow meter.

Let us know how you got on

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