golf mk4 loss of power... help please

[tannerzxr]

good point lol. ill have to search for the report sheets.

[Mattposs]

Ive got the exact same problem with my car.

Girlfriends brother is mechanic down at local VW dealer so he took it in and whipped it onto the diagnostics machine ( not sure which one but it was the main VW dealer in Carlisle (not some backstreet Harry)) and it came up with overboost aswell.

He told me he could take the turbo to bits and lubricate the vanes as a temporary measure but apart from that it had to be a new turbo!!

I'll be interested to hear what the problem actually is when you find out!

[tannerzxr]

this is exactly how the vag com print off reads

1 fault found:

17965 - Charge Pressure Control : positive deviation
P1557 - 35-10 - - - Intermittent

Readiness: 0 0 X X X

hope that makes any sense. id really appreciate some experience of this fault if possible.
some thing hisses or does not sound right tho if that makes any sense

[mobitune]

17965/P1557/005463 - Charge Pressure Control: Positive Deviation

Possible Symptoms

Reduced power output
Limp mode

Possible Causes

Boost Pressure too High
Hoses/Pipes incorrect connected, disconnected, blocked or leaking
Charger Pressure Control defective
VNT (variable nozzle turbo): nozzles stuck
Solenoid Valve for Boost Pressure Control (N75) defective

Possible Solutions

Check Hoses/Pipes to/between Components
Check Solenoid Valve for Boost Pressure Control (N75)
Check / Clean / Replace Charge Pressure Control
Check / Clean mechanism for variable nozzles