Boost leak or bad turbo?

trapahh · 11-11-2018, 03:10 AM

While playing around with a benz around 120 or so, my half engine light can on so i slowed down and cleared the code on my tablet while driving. Car is FBO running stage 2+ MHD v7 map. I didnt have any problems with the car while driving home and everything felt normal. Though, i did notice that when im in high rpms, it sounded as if air might have been leaking out of something. I wouldnt describe the sound as a whistle or anything as such but kinda like a lot of air going somewhere. I check the code and it was 30FF. I also noticed that i am not hitting my boost target. I pulled the car in different gears and noticed that i would reach around 14 but my target is around 16/17. My vacuum seems to be good consider its at -11.8 but i just cant seem to get past 14psi. I will post some of my logs and was wondering if anyone can tell me if i have a pair of turbos going bad or if there is just a leak somewhere. Thank you

https://datazap.me/u/deebro180/log-1...=1&data=3-9-26

JD_YSL · 11-11-2018, 11:40 AM

Seems like a boost leak. Does the psi dip up and down? Or stays constant at 14?

trapahh · 11-11-2018, 02:53 PM

Well it builds up to around 14 pretty quick but it just doesn’t go past it

trapahh · 11-16-2018, 09:58 PM

UPDATE: I took the car into the shop and my mechanic said he performed a smoke test. He said everything checked out to be alright, nothing seemed out of the ordinary and even put a few turns onto everything. When I got the car back, I still wasn't hitting target. Can anyone point me in the right direction on what to do next please. Thank you

11-11-2018, 03:10 AM	#1
trapahh New Member 3 Rep 24 Posts Drives: n54 335i Join Date: Sep 2014 Location: New York iTrader: (0)	Boost leak or bad turbo? While playing around with a benz around 120 or so, my half engine light can on so i slowed down and cleared the code on my tablet while driving. Car is FBO running stage 2+ MHD v7 map. I didnt have any problems with the car while driving home and everything felt normal. Though, i did notice that when im in high rpms, it sounded as if air might have been leaking out of something. I wouldnt describe the sound as a whistle or anything as such but kinda like a lot of air going somewhere. I check the code and it was 30FF. I also noticed that i am not hitting my boost target. I pulled the car in different gears and noticed that i would reach around 14 but my target is around 16/17. My vacuum seems to be good consider its at -11.8 but i just cant seem to get past 14psi. I will post some of my logs and was wondering if anyone can tell me if i have a pair of turbos going bad or if there is just a leak somewhere. Thank you https://datazap.me/u/deebro180/log-1...=1&data=3-9-26
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11-11-2018, 11:40 AM	#2
JD_YSL Registered 0 Rep 3 Posts Drives: 335i n55 Join Date: Nov 2018 Location: Houston, Tx iTrader: (0)	Seems like a boost leak. Does the psi dip up and down? Or stays constant at 14?
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11-11-2018, 02:53 PM	#3
trapahh New Member 3 Rep 24 Posts Drives: n54 335i Join Date: Sep 2014 Location: New York iTrader: (0)	Well it builds up to around 14 pretty quick but it just doesn’t go past it
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11-16-2018, 09:58 PM	#4
trapahh New Member 3 Rep 24 Posts Drives: n54 335i Join Date: Sep 2014 Location: New York iTrader: (0)	UPDATE: I took the car into the shop and my mechanic said he performed a smoke test. He said everything checked out to be alright, nothing seemed out of the ordinary and even put a few turns onto everything. When I got the car back, I still wasn't hitting target. Can anyone point me in the right direction on what to do next please. Thank you
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