As the title suggests my T diddly i has developed a bit of a problem. Has had an intermittent fault whereby if engine is under heavy load it'll cut power and go into limp mode. Cycling the ignition usually clears the fault and away ye go. However it cut power the other day and has stayed in limp mode ever since. Main dealer has had the car twice this week with no joy locating the problem! Car feels like its strangled. Anybody?

How many miles has your car done?

 

Firstly get it scanned for fault codes.

 

If it's logging overboost, check your turbo boost pipes are connected properly and are not split.

 

If they're fine, this should resolve most overboost issues

 

http://www.briskoda.net/forums/topic/243533-the-mr-muscle-vnt-turbo-treatment-thought-we-needed-a-guide-of-sorts/

It's been scanned by main dealer, came up as a failed boos pressure sensor, they replaced it even though they were pretty sure that WASN'T the problem. Car still in limp mode. Car has 370k but is mechanically sound. Was given a clean bill of health just two months ago by main dealer. They're scratching their heads, say they've never come across this before ( which I find a little bit hard to swallow).

Are you on your original turbo? EGR ever replaced or cleaned?