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BMW 3-Series (E90 E92) Forum
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Low Boost Psi
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04-15-2024, 05:46 PM | #1 |
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Low Boost Psi
Was watching my boost psi in the data logs and I’m not even getting 6 psi I’m on stage 2 + MHD and I’m pretty sure I used to get up to 18.2 and I’m talking about max rpm’s full boost idk how I’m getting 6 any recommendations what I should double check. Could it be my wastegates one of them feel easy to push in while the other feels like it holds the pressure much better new turbos?
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04-15-2024, 05:54 PM | #3 | |
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04-15-2024, 05:59 PM | #4 |
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I went onto the v7.1 map like a week ago to try it out everyone saying it’s better and it kept giving me a 30FF and engine malfunction but when I switched back to V10 im not getting engine malfunction or 30FF it’s been in my shadow codes a couple times but not throwing it as active
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04-15-2024, 06:03 PM | #5 | |
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04-15-2024, 06:05 PM | #6 |
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04-15-2024, 06:13 PM | #7 | |
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What to log? Most are already selected by default but here is a general list: Boost Boost Target Coolant Cyl1 Timing Cor Cyl2 Timing Cor Cyl3 Timing Cor Cyl4 Timing Cor Cyl5 Timing Cor Cyl6 Timing Cor Fuel Low Pressure Sensor IAT Lambda bank 1 Lambda bank 2 Load actual Load req Rail Pressure RPM Speed STFT1 STFT2 Throttle Position Timing Cyl. 1 WGDC After PID WGDC Bank1 WGDC Base Value |
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04-15-2024, 06:15 PM | #8 |
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Most likely you have a boost leak but check this out. https://bmwtuning.co/bmw-n54-30ff-en...-repair-guide/
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chuc10.50 |
04-15-2024, 06:17 PM | #9 | |
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04-15-2024, 06:41 PM | #10 |
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[QUOTE=TiAgAu;31075676]Most likely you have a boost leak but check this out. https://bmwtuning.co/bmw-n54-30ff-en...-repair-guide/
https://datazap.me/u/chuckw05/log-17...og=0&data=4-19 Alright making sure this is all setup before I get another log this is some random one |
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04-15-2024, 06:47 PM | #11 | |
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[QUOTE=chuc;31075736]
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04-15-2024, 06:58 PM | #12 |
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04-15-2024, 07:29 PM | #13 | |
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Here is my 3rd WOT pull I forgot to turn the log off for a sec but you can see it at the beginning. |
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04-15-2024, 10:11 PM | #14 | |
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With the vacuum lines usually around the oil filter housing is where the hoses perish. |
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04-19-2024, 09:00 PM | #15 |
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Major boost leak or your waste gates/turbos could be shot. Could be boost solenoids too but I think more likely boost leak or worn turbo hardware. How many miles on the turbos?
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04-19-2024, 09:02 PM | #16 |
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195k they are the originals. They are well over due. I want to go single turbo might just have it sit until I get one
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