N55 blow off valve

image This is a good one,,,we don’t see this to often,,,,F10 2012 N55 engine,,,,check engine light came on 1 time only,,,,fault was turbo over boost,,,,happen at 2600 rpms,,,,,we already replaced the electric pressure control valve which sits next to the valve cover,,,,I performed the turbo boost test,,,,passed test,,,,I smoke tested the turbo and intake system,,,no leak,,,,if there was a leak I would have a low boost fault.image I checked the wastewater,,,waste gate is vacuum controlled,,,I checked the waste gate with a vacuum pump,,,,,waste gate working ok,,,,this picture is the electronic blow off valve,,,,we were thinking the blow off valve was hanging up,,,causing the over boost fault.image Replacing the blow off valve wasn’t to hard,,,,you just remove the water pump and you have easy access to the blow off valve,,,,just 3 Allen head bolt hold it into place.,,,,this took care of the problem.

This entry was posted in Uncategorized and tagged , , , , . Bookmark the permalink.

3 Responses to N55 blow off valve

  1. Faizel Latief says:

    Hi,
    I have a 2010 F10 535i (N55) and it came up with Drivertrain warning and went into limp mode. This happens almost every time and not necessarily under heavy acceleration…even when cruising.
    BMW ran diagnostics and kept getting these errors:
    “Charging pressure control, plausibility Pressure too high”
    “Charging pressure control: Switch-off as consequence”
    They couldn’t pinpoint the fault and ended up replacing spark-plugs and coils. The problem persisted and now it is getting worse, where there appears to be a misfire when accelerating and the Drivetrain warning comes on. These are the messages they see now:
    “Intake air temperature sensor, electrical: Short circuit to B+”
    “Charging pressure control, plausibility Pressure too high”
    “Charging pressure control: Switch-off as consequence”
    “Blow-off valve: Jammed closed”
    “Super-knocking, cylinder 6: Injection switch-off”
    Any ideas?
    Kind regards,
    Faizel

    Like

    • It looks like you have a couple of problems,,,,the charge pressure issue is probably caused by the electronic boost control valve it sit on the passenger side next to the valve cover,,,,it has 2 vacuum line going to it and a electrical plug,,,,also make sure the vacuum lines are ok,,,,,the knock on cylinder 6 and intake sensor sounds like new faults after they did the repairs,,,,,start with the electronic boost control valve and see what happens.

      Like

    • Make sure the intake sensor and cylinder 6 coil and injector are plugged in

      Like

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.