1998 1.8T A4 B5 AEB quattro 5spd
Ok so long story short, I bought the car back in may and the guy who i bought it from said the turbo was rebuilt a month or two before i got it.
starting yesterday i've noticed a significant loss in power. I just went on a drive with it to check things out and realized that instead of hearing the regular turbo whistle i hear a clicking noise.

The noise is not audible at idle or when just cruising but it is when i am accelerating. could someone help troubleshoot this? this is what vag come gave me (i checked for errors hoping it will say something that could help):
VAG-COM Version: Release 409.1-S


Chassis Type: 8D - Audi A4 B5
Scan: 01,02,03,08,15,17,25,35,45,55,56

-------------------------------------------------------------------------------
Address 01: Engine
Controller: 8D0 907 557 P
Component: 1.8L R4/5VT MOTR HS D04
Coding: 06201
Shop #: WSC 06435
1 Fault Found:
17584 - Bank1: O2S (Lambda) Correction Behind Catalyst: Control Limit Reached
P1176 -- 35-00 - -
Readiness: 0000 0000


anyone with some advice or troubleshooting advice please help...If I need to get another turbo I would like to upgrade to ko4 so if someone could tell me what are the things this upgrade would require (only things that are required for it not preferable) ..

Thank you in advance

 

I had very same problem on my A4 ao 70,000 Km and replaced the turbo unit with an OEM.
Problem persisted and by changing the fuel filter i solved the problem.
Try it, may save you a lot of money.

Mike

 

thanks mike, ill check if its the fuel filter...

 

hope to be a help.
mike

 

the cov

 

maybe this will help someone figure it out

http://www.youtube.com/watch?v=OTv6iP9F_Tc

please I need help figuring out what it is, i went to a mechanic and all i needed was 5 minutes of his time and he was a jerk and brushed me off, he said he knows whats wrong with it but he wants me to leave it there so he can diagnose it, cost min 1 hr $70-100, for a 5 minute if he already knew what was wrong..

i am really short on money and still have to pay 2k by end of november for school, now this came up

 

lol if he told u what the problem was, u would of gotten to your own cheaper mechanic to fix the problem.

diagnose the problem with the OB2 cost around 80 to check the problem anyway.

 

I wasn't going to take it to another mechanic, I do the work myself to save money, I was hoping he wouldnt charge me a full hour for something that according to him takes 5 minutes, he said he already knows whats wrong with it so yeah.

he could've said something like look ill look at it but its going to cost you 20-30 bucks, but yeah, and on top of that he was so rude..



im onto checking the wastegate next...