Thread: PO171 Found!

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  1. #1 PO171 Found! 
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    Thought I would share my experience with this FN code. It may help others out.
    I have been chasing this code for a year and a half now until the other day, thought it was vacuum lines, fuel pressure problems, exhaust leaks, gasket issues. It would be at 16.4 idle and as soon as i tapped the gas it would go to 0. I would get the CEL on and off. No one here has checked there boost bypass valve. Mine was leaking from underneath where the actuator pole goes into the plunger of the boost valve. I sprayed carb cleaner in there and it pulled it right in. Also noted that valve wasnt springing back normally also probably do to the fact because of the vacuum leak. I new right there that was my vacuum leak. Now this did not show up at all when we smoked the motor. Installed new boost valve and now car idles at 0.8
    1.9 Rockers- 42.5 injectors- 3.4" mps- Wizaired 104s- 180*- PRJ 10mm wires- SD headers 3" DP- Hp tuner- Dynotech stage 2- 3.29s 1'' chain
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  2. #2 Re: PO171 Found! 
    Florida Tuner Z34Phoenix's Avatar
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    great find! thank you for the share. hope this helps many others

    96 Z34 (RIP LQ1 14.81@92.3) L36 Swap 14.9@91.5 www.cardomain.com/id/z34phoenix
    Topswap: P&P All,Si Valves,L76's,LW Pushrods,SD's,DHP PT PB 13.91@99.8
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  3. #3 Re: PO171 Found! 
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    Hey no problem maybe a sticky lol
    1.9 Rockers- 42.5 injectors- 3.4" mps- Wizaired 104s- 180*- PRJ 10mm wires- SD headers 3" DP- Hp tuner- Dynotech stage 2- 3.29s 1'' chain
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  4. #4 Re: PO171 Found! 
    Turbo is the way to go. BillBoost37's Avatar
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    If we added the other bunch of things to the reason for the code, it would definately be a great sticky.
    I drink..so consider that when reading my posts.

    2010 Audi A6 Dual IC's
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