Dear all

Im new to this forum, i have had my Audi A4 2000 B5 saloon 1.9Tdi 110 for 9 months, she went through jer MOT yesterday with minor bits and bobs. Shes always been a bit sluggish more so recently and getting worse.

I tried a new MAF which gave very bad hesitation on accceleration right through the rev range until i got the fault code 17964 which means im now in limp mode.

I have checked the vac hoses and they all seem fine (ordered replacments just in case) also the VNT actuator seems to be working as i excersised it in VCDS and the N75 valve appears to be doing what its supposed to.

Cleaned gunk out of inlet manifold

Running low on ideas!

Any help much appreciated!