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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 > New turbos, boost surging/oscillation while accelerating



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      02-08-2013, 08:03 AM   #1
Bme30
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So I got turbos replaced under warranty. Very thankful. Just having some issues and need help. As the thread states I'm getting surging or oscillating while accelerating.
Any ideas would help.
Edit. The car is stock besides downpipes. No other mods.
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      02-08-2013, 09:45 AM   #2
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Originally Posted by Bme30 View Post
So I got turbos replaced under warranty. Very thankful. Just having some issues and need help. As the thread states I'm getting surging or oscillating while accelerating.
Any ideas would help.
Edit. The car is stock besides downpipes. No other mods.
Quick question, you have downpipes and no tune and they changed your turbos under warranty?
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      02-08-2013, 10:06 AM   #3
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No changed with stock dp
Was surging with stock dp on. Had my dp put on yesterday and the surging is still there.
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      02-08-2013, 10:10 AM   #4
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Had a fuel pump plausibility code too. That was before the dp install. I got the car back earlier this week. i replaced one of my boost solenoids before the turbo install thinking that was causing my underboost. I'm going to replace the other one too.
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      02-08-2013, 10:29 AM   #5
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I had somehting like this a long time ago that turned out to be a damaged o2 sensor that was not throwing any codes. Pretty sure mine happened from installing and uninstalling DP's for dealer visits at that time. Just a thought...
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      02-08-2013, 10:33 AM   #6
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I had somehting like this a long time ago that turned out to be a damaged o2 sensor that was not throwing any codes. Pretty sure mine happened from installing and uninstalling DP's for dealer visits at that time. Just a thought...
very good and probably a correct thought.
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      02-08-2013, 10:38 AM   #7
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Quote:
Originally Posted by Jeller
I had somehting like this a long time ago that turned out to be a damaged o2 sensor that was not throwing any codes. Pretty sure mine happened from installing and uninstalling DP's for dealer visits at that time. Just a thought...
Awesome ill check it!
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      Yesterday, 07:41 PM   #8
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Did you resolve your problem ?
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      Yesterday, 08:08 PM   #9
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Check vacuum lines. Could be a small boost leak
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      Today, 05:02 AM   #10
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Originally Posted by evoix
Check vacuum lines. Could be a small boost leak
I think it could be my forge DVs... Maybe then don't open/close properly
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