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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 > No boost running really rough



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      08-13-2014, 01:04 PM   #1
cmotzner
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No boost running really rough

hi guys driving the other night map 5 on jb4 about 15 pounds of boost and had what i thought was a misfire jb4 cleared the code so i was reading zero codes.

Pulled all the plugs and replaced them cant get it to throw the ses light now but i have no boost and it runs very rough.

Where to start??


Thanks
Cody




Did get it to throw a code misfire cylinder 4 29D0

and 1/2 engine light came on

Last edited by cmotzner; 08-13-2014 at 03:51 PM.. Reason: added logs
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      08-13-2014, 01:07 PM   #2
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How about a log.
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      08-13-2014, 01:23 PM   #3
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Please do couple logs from 3rd gear (2500 rpm to redline with pedal 100%)
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      08-13-2014, 01:55 PM   #4
cmotzner
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I would love to but cant get the software load into my computer and get it hooked up.

any recommendations

Thanks again
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      08-13-2014, 02:01 PM   #5
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take it to a shop
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      08-13-2014, 02:11 PM   #6
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If you have auto clear on I would start by shutting that off and then drive it a little to see if it will throw a code... Are you still running the original charge pipe? I'm on my phone so I can't see your mods..
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      08-13-2014, 04:26 PM   #7
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Update>>>>

Misfire fixed it was a bad coil

Now why no boost i did just put in a charge pipe so i will retrace my steps on that
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      08-13-2014, 04:27 PM   #8
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Quote:
Originally Posted by cmotzner View Post
Update>>>>

Misfire fixed it was a bad coil

Now why no boost i did just put in a charge pipe so i will retrace my steps on that
It is likely not connected, or not connected correctly.

Make sure you have the o ring in place as well as the clip seated correctly. Last but not least make sure the T bolt clamp is tight on the intercooler side.
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      08-13-2014, 04:33 PM   #9
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Check all vacuum lines.
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