17965 P1557 35-00 Limp Mode Awx engine 412,000kms

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comfortline88
still on the production line
Posts: 26
Joined: Tue Jul 28, 2015 12:48 am
Passat model: B5.5

17965 P1557 35-00 Limp Mode Awx engine 412,000kms

Post by comfortline88 »

Hows things
I have an awx engine car
Going into limp mode
Car has had vac line simplification done
Just running the n75 from tandem pump to lower connection and top connection on n75 to turbo actuator
Side connection is directed directly to atmosphere, I am waiting on a small filter for it in the post
Have swapped over n75s and still the same
tried Maf in and out, no difference
Actuator comes up and down perfectly with Vag (measuring block 11 1400 Rpm)
Took map sensor out and looked fairly oily and put back in (could this be the fault,reads over 92% in operation when driving)
Car has had egr blanked and race pipe fitted the last 100,000 kilometres
The tandem pump nipple is slightly loose could this cause the positive deviation fault
Its all leading me towards sticky vanes in the turbo
Will try the mr muscle

Any ideas or am I on the right track
When the car does boost the turbo is perfect
Loads of power and will pull to 4200 in 3rd and 4th
I always gave the car a good hard drive

Thanks for any help

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