hi3rophant Posted April 7, 2018 Share Posted April 7, 2018 Hi guys My 1.8T B7 idles at about 1200 rpm when engine is hot. Idle is normal after cold start , about 800 rpm. Check engine light is on with error code P0171. Pretty sure is a vacuum leak. I am about to do a boost leak test and the question is if I connect the tester on the intake and block the hose going into the throttle body do I have a enclosed system? What's the best way to do this test? Thank you Quote Link to comment Share on other sites More sharing options...
WPAWS Posted April 7, 2018 Share Posted April 7, 2018 not a tech person m8 but found this if its of any help https://www.obd-codes.com/p0171 Quote Link to comment Share on other sites More sharing options...
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