quattrorally

2001 1.8T Tip, the car use to have a K&N, I replaced it with OEM.
I got a cel (lean on all,when the car is cold) so I started logging (just got my vag) doing a lot of STFA, and here are my results, (PLEASE confirm):

I am getting boost requests of ~2130 mbar
actual boost closely follows.

My Air Mass In BEFORE cleaning my MAF max:128.58 (socond gear pull)
My Air Mass In AFTER cleaning my MAF max:134.50 (third gear pull)

My channel 32 BEFORE cleaning was 15.6 for Partial Throttle
My channel 32 AFTER cleaning was 13.3 (so far) for Partial Throttle

I cleaned the MAF by soking it in 99% alcohol for 1h and sloshing it a bit.

BUT, my guess is that the Ffffing MAF is still not what it should be

And with a boost request of 2130 which is 16.385 psi I should be getting around 170 g/s of air

Am i correct ?

Thanks for any help!

WJM

between the airbox and the turbo specifically.

That would cause your MAF readings to be low, and for you to get a lean code.

quattrorally

are there any aids ?

quattrorally

The new MAF works perfectly the second adaption for group 32 kept going down and after 15 or 20 minutes of driving it went down to 4% it will probably go down further with more driving.

Thanks to every one that helped.

PS: the MAF was refurbished from a local dealer. $110 CAD, with an additional $35 deposit for the old one. If I bring the old one back, I get the $35 back.