Hi there

Can someone help please with a frustrating problem, Went into town on the hottest day of the year a couple of weeks ago with no problem. Parked for about 3 min then tried to drive home. Car started hesitating and no power- seemingly no turbo, Got home, plugged in obd dongle and up came MAF. Bought new one- same problem  Now I have a new fault on obd stating Boost Pressure sensor - bought new one- improvement, but still no turbopower. Checked variable vane actuator -working fine- took EGR apart, cleaned and replaced- working ok too. All vacuum lines working and no leaks. But if I remove the MAF connector, the car no longer hesitates and manages 70mph, but still no power- same with the Boost pressure sensor.

Then I noticed that the throttle reading stayed at 100 and never changed throughout the rev range, although the pedal obviously works. Does anyone think that my problem might be pedal sensor related and how easy is it to check and change.

Many thanks

Mike 

You may have bought a duff MAF since the car seems to run better with it disconnected.

 

Beyond that I think you need VCDS to make progress.