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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Help please. Rail pressure bouncing



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      08-11-2016, 02:13 PM   #1
335ixdrive18
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Drives: 2009 BMW 335i xdrive
Join Date: Dec 2013
Location: Chicago, IL

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Help please. Rail pressure bouncing

Hey guys, so yesterday I put a new injector on cylinder 6 and calibrated it correctly. I also tapped my manifold for a bigger bov bung. I finished all this and the car was running perfect. Later on in the day, under part throttle the car started feeling jerky and wanting to misfire. I did a couple logs and it looks like the hpfp is bouncing up and down. I do have port injection and stage 3 lpfp. This started happening out of nowhere. Anyone that can assist please comment.

http://datazap.me/u/djordjek/track-logs?log=0&data=3-23
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