Rich AFR at WOT. Why?

[Animal Mother]

Just had my car back on the dyno. Had a boost leak previously but a new IC sorted that out.
Car now putting out the sort of BHP I'd expect, but, it is still on the rich side.
The car was obviously running at WOT on the dyno, so what can cause a rich mixture at WOT?
AFR reaches 10 (%?) at 3500rpm then goes below the visible scale.

[Greg_S]

What spec is the car currently?

[Animal Mother]

What spec is the car currently?

See my signature.

[Knight Rider S4]

scan motor with vag.com and see if the lambda sensor is faulty...MAF might need cleaning as well

[Jas11n]

Lambda is taken out of the loop at WOT though.

[Knight Rider S4]

True..

[Flat on my back]

RE maf, near the end...

Testing and re-calibration?

http://www.s2central.net/ds_G70.html

Not sure if more has come of this?

[Jamo]

Personally I think you need your car real time mapped as a generic chip is just that even if it is the excellent homefries it may not suit every car on the market.

[dest]

We checked the fueling on mine after I sorted the boost leak.
The only mod Ive got engine wise is a Milltek silencer, and it was running alittle rich when it got towards the higher end of the rev range

[Animal Mother]

Already has new lambda and MAF has been cleaned.