White marks of turbo wheel

[danc1706]

Had my turbo checked out today to see if the seals had gone on it but turns out they are fine, the bloke who looked at them said my car was running lean as there were white marks on my turbo wheel, anyone know what the cause of this is as the car is standard (edition 30)

[bacillus]

I would do some lambda logs to verify that there is a problem with running lean if a vcds scan doesn't flag up a faulty lambda sensor .

[danc1706]

Ok cheers, would a k&n air filter effect it, it was on there when I bought car! But surely the ecu would detect the air flow on the car and put more fuel in?

[bacillus]

Yup, the ecu should adapt to the increased airflow and alter the fuel mix accordingly.

[danc1706]

Ok cool so if it doesn't adjust then could mean faulty lambda sensor

[bacillus]

Ok cool so if it doesn't adjust then could mean faulty lambda sensor

A faulty lambda sensor is one of the possibilities.
Like I said before, getting a scan will get you a long way into solving your issue.

[danc1706]

Ok cheers, my mate has a vag com so that should work?

[Pikey Motorsports]

What made you think you had turbo issues?

[pudding]

My Garrett GT35R turbo looked like that after 60K miles (from new) on an old project of mine.  The turbine blades were in A1 condition.   Modern turbo engines run leaner than the 80s gas guzzlers.

The ED30 has EGT (Exhaust Gas Temp) backup where the ECU will shove a load of fuel in if it detects excessive exhaust temps, but check for EGT related fault codes just in case.

If you can get hold of VCDS (formerly known as VAG-COM), log the following blocks and go out for a 20 minute drive: "Lambda Regulator", "Lambda requested",  "Lambda actual", "MAF", "Boost requested", "Boost actual" and "Ignition advance".  Paste into Excel and then upload to here.  I will be able to tell you from that if you have a problem or not.

[danc1706]

It was smoking slightly on let off!

[danc1706]

Ok I will try get hold of my mates vag com and have a look