Please Help! Stumped with a 30FF...
06-08-2017, 11:03 AM
#11
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My Ride: 05 530i M54
Model Year: 05 530i
Engine: 3.0 M54
Originally Posted by 535Paul
I also noticed a wooshing sound that is seeming to get worse and lower boost number.
06-08-2017, 11:14 AM
#12
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06-08-2017, 12:52 PM
#13
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My Ride: 2007 530xi: Sport, NAV, PDC, HUD, Cold Wthr, CA, Logic 7, HD Radio, SAT, Custom NCS coded options 2008 535xi: Sport, Night Vision, NAV, PDC, HUD, Cold Wthr, CA, Logic 7, SAT, Custom NCS coded options, Rear Seat Heat Retrofit, Passport 9500ci
Model Year: 2008
Engine: N54
You can test your wastegates with a manual vacuum pump. There could be something wrong with the one of the actuators or the wastegate itself for sure.
But... I am still thinking a vacuum leak. Boost seems to be pretty close for a while then the vacuum just can't get enough to pull closed the wastegate any further.
Shut down the car. Then within a few seconds pull off one of the vacuum lines to the vacuum canister and see if there is still a vacuum. Do some searching on this diagnostic test because I don't recall how much time is considered "good" or "bad" to still maintain a vacuum.
Keep at it!
But... I am still thinking a vacuum leak. Boost seems to be pretty close for a while then the vacuum just can't get enough to pull closed the wastegate any further.
Shut down the car. Then within a few seconds pull off one of the vacuum lines to the vacuum canister and see if there is still a vacuum. Do some searching on this diagnostic test because I don't recall how much time is considered "good" or "bad" to still maintain a vacuum.
Keep at it!
