Limp mode but no light?

[carmaduk]

Hi all,
I have an 05 Leon Cupra FR tid, completely standard.

I've had it for about 2 months now and twice, most recently yesterday it has gone into limp mode (no turbo whatsoever) or certainly feels like it with complete loss of any power at all but no engine management light comes on, if I turn it on and off again it springs back into life, any ideas would be most appreciated?

Some background:- its done just over 100k and has full history with it.

Thanks in advance

Craig

 

[BigJase88]

Limp mode from turbo overboost

You'll have sticking vanes on the turbo

Give turbo a clean out or if you can a good few blasts when upto temp should help it
Worse case scenario new turbo required

 

[carmaduk]

I have thought the turbo has always been really loud, is this the norm on this engine?

Loud as in really loud whistling.

I've had over 40 cars of various forms inc petrol and diesel turbos and not heard a turbo whistle like this one...

thanks

Craig

 

[Paul43]

Turbo noise

I think these engines have noisey turbos anyway. It's not the turbo it's self it's just the amount of air they move. I have the same car as you 05 fr 150

 

[carmaduk]

Would be interesting to hear another as I've suspected exhaust blowing also but that's a more deeper tone, you say near Kettering, anywhere near Corby mate?

 

[BigJase88]

My 150 tdi fr's turbo is extremely loud!

I've mapped it and banged a k+n cone on it, sucks like a good un

 

[Paul43]

I actually live in thrapston mate. If you about weekend ill pop over its not far away. )

 

[Buttons]

Had this with my FR, gave it a good blast on the motorway, high revs and holding it there for a bit in 3rd and 4th gear (Italian tune) and it did the trick, no more limp mode I also put a bottle of forge turbo cleaner and all is good for now.

 

[K22P UP]

Exactly same symptoms with my own mate car/year pretty much same,sticky vains with my own so I've been told, as you've said nothing comes up on the dash it's produced with the overboost hence turbos coming off for a good inspection and clean up always seemed pretty loud aswell to be fair, mine needs sorting asap.... Probably loads of threads on here as to what's been used to clean them up etc heard mr muscle is suppose to be quite good stuff!!

 

[BigJase88]

Mr muscle is good!

I cleaned mine in situe, wasnt easy but it worked a treat

Sticking vanes is caused by slow driving, people dibby dabbling doing mpg challenges all the time!

I blast the soot out of mine at least once on a daily basis to stop it reoccuring!

 

[Nath.]

Limp mode from turbo overboost

You'll have sticking vanes on the turbo

Give turbo a clean out or if you can a good few blasts when upto temp should help it
Worse case scenario new turbo required

Had this twice before on a 1.9 PD. one time it was a split vac pipe to the N75 valve (cut off end of pipe and re-join to N75)and one time the N75 valve was sticky (replace N75 for about £25 from motor factors).

 

[Alec fr]

I had this on my a4 tdi turned out to be a wire to the n75 had worn and was shorting out on the bulkhead a bit of insulation tape an was fixed check on vag comm that should give you a code