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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 after Fuel Injector Change Out



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      11-22-2016, 11:23 AM   #1
Boland01
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Unhappy No Boost after Fuel Injector Change Out

I just installed 6 new index 12 injectors as the old #1 revision had two bad ones. I also coded with INPA. The car drove great for a day but now I'm getting zero boost. The rear exhaust is also louder which tells me the waste gates are open. Other than this the car drives and idles great.

I checked the vacuum lines and am getting vacuum to the "pressure condensors" but nothing past that. If I pull the vacuum line past the condensors and put on a vacuum directly to the wastegates they move just fine (at least the rear one I can see). Do you think it's even possible both went out at the same time? Also, I'm not sure how this is related to the injector swap and code.

Running the torque app it shows nothing. On the JB4 I get 2F6C can flap which in no big deal, and 2AE and 2AF which make no sense as it's missing a number or letter.
The car does have cat less downpipes and the JB4 G5. Any direction ideas or insight on how to diagnose and fix are appreciated.
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      11-22-2016, 04:23 PM   #2
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did you do a leak test?
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      11-22-2016, 04:42 PM   #3
Boland01
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Yes, the boost solenoid nearest the front bumper won't hold a vacuum. I just went ahead and ordered two new Boost solenoids (Pressure connectors). They'll be here on Monday. Hope this solves the problem.
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      11-22-2016, 04:51 PM   #4
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Quote:
Originally Posted by Boland01 View Post
Yes, the boost solenoid nearest the front bumper won't hold a vacuum. I just went ahead and ordered two new Boost solenoids (Pressure connectors). They'll be here on Monday. Hope this solves the problem.
Good luck, let us know how it goes
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      11-23-2016, 09:33 AM   #5
Boland01
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Quote:
Originally Posted by GottWhat View Post
Good luck, let us know how it goes
Thanks, will do.
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      11-27-2016, 08:11 AM   #6
Boland01
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Fixed. Bad boost solenoids.
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