EM TuningJMB Retrofits
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  1. #1
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    Mar 2010
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    London,England
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    UPSIZE TO KO4 OR REPLACE KO3

    I've got a 2004 A4 1.8T 163bhp,i think my turbo is on it's way out been hearing a low pitched siren like whistling sound,got it remapped about 3 months ago went like a rocket at first but power just faded gradually,now it feels like i don't even have a turbo.Had the following done and replaced with no results.

    New MAF,DV,n75, O2sensor and had it tested for boost leaks.......nothing!

    Can someone please help me
    I was thinking of replacing the turbo with a larger one,is it worth it to go from a ko3 to a ko4 and
    if so where can i get it done without braking the bank.

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  3. #2
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    Mar 2010
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    London,England
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    Installed a N75j valve today,massive improvement can actually feel the car boosting now.

    will it affect the performance if I extended the hose connecting to the turbo,because the n75j is different to the stock n75.

 

 

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