Restricted Power on my Altea 105PS TDi (2004)

[stepr1]

I am sure someone has probably answered this before but couldn't locate an answer via searching.

Symptoms:

Car was sat idle in the Body Shop for 3 weeks having some panels replaced. Got it back thursday, first time down the motorway got to about 70 under full throttle and I felt a very small judder (like a speed limiter cutting in), power reduced but car would still acceralate beyond 80.

Stopped after 10 minutes and restarted, problem went away. Then, as soon as I applied full throttle on the motorway for more than a couple of seconds it did it again.

Restarted car and problem went away. No lights on dash until it did it again this morning. Now ECU light is on permanently even after restart.

I guess it's the Turbo on its last legs but hoping someone has experience of it being a sensor or clogged air flow etc. Maybe 3 weeks in a dusty bodyshop might have caused some blockage!! (tightly clutching a straw!!).

Thanks in advance,
Rich

[Colonial]

Sounds like it is going into limp mode.

Mine did that but replaced the O2 sensor in the exhaust and it went away.
Fingers crossed that'll solve it for you.

[flashy]

you may find the car is overboosting and going into limp mode, if you full throttle it for a second or so, it will never meet or overmeet the requested boost and limp you.

Try to look for intercooler hose leaks from joints, or a faulty vac hose on the top of the turbo actuator.

Doesnt sound like anything sensor wise.

[stepr1]

Thanks guys for the feedback.

Interesting that the ECU light went out tonight and it seemed more resilient to the 'limp mode'. It must have been at least 5 seconds of full throttle in 5th before it cut in.

ECU light is still out.

[va1o]

Seem to remember having the same problem with the Golf (2006 TDI 105) on the motorway a few years ago. It happened a few times, just as you describe a very slight judder. Didn't happen every time though, and no warning lights on dash. I didn't bother having it looked at as it was predominantly a town car. Said car is now sold.

Edited by va1o on Monday 17th May 23:18