scenic 1.9 dti limp mode why?

I eventually traced a very similar fault on a diesel vectra: on that it was a leak in the vacuum circuit which operates the turbo wastegate and swirl chamber valve. I do not know if your vehicle is similar (in the vacuum operation dept.) If it is then it is worth a look, I found it by hooking up a vacuum gauge in the circuit, with the car running there should be plenty of vacuum, there wasn't, it was then a case of blanking off bits till the vacuum was restored, then replacing the faulty bit.

In message , Mrcheerful writes

Sounds a bit like a split turbo hose to me

going to look into the turbo pipes tomorrow morning

today i removed the airflow meter to clean it

oops dont bother far to fragile the wire strips just fall off when touched

thats another £100 down the drain

Only way to attempt cleaning a MAF is with aerosol carb cleaner and afew squirts.

It's 50% effective. If no better or you break it, was no harm done in trying.

Tim.

thanx m8 your right cant brake a broken airflow meter

i feel a bit happier now

factors let me down delivering the meter they say itll be tomorrow now i removed all air pipes to the intercooler and airfilter checked them thourily for splits and they wer good just have to wait for the new airflow meter that we will find out if it was that

same fault when i fitted the flow meter so i rechecked the cambelt timing and found pump waz 1 tooth advanced

refitted the belt and its all running sweet

fault rectified thanx everyone

Strange you didn't mention the head and belt replacement, it might have helped with diagnosis.