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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 > Car surging Help



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      06-23-2013, 08:21 AM   #1
N54 TuNeR
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Car surging Help

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I just got a half engine 1/2 power on Nav.checked codes & Throttle valve potentiometer 1, plausibility with regard to air mass,Throttle valve potentiometer 2, plausibility with regard to air mass.Before i turned car off i decided to check under hood.i found this,the blow-off valve opening & closing & almost stalling?Is it doing this cause of the throttle body?I had this code about a month ago & its back again.See throttle body is around 400.00 new.Trying to diagnose it if something else can cause this.Anyone run into this same problem?
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      06-23-2013, 05:15 PM   #2
joec500
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I had similar issues with the same errors. They were very sporadic, and sometimes would not return for months, but at the end of the day, changing the Throttlebody was the only thing that fixed it for good. It's a super easy DIY, and you can the part for about $300-350 online.
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      06-23-2013, 09:46 PM   #3
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Quote:
Originally Posted by joec500 View Post
I had similar issues with the same errors. They were very sporadic, and sometimes would not return for months, but at the end of the day, changing the Throttlebody was the only thing that fixed it for good. It's a super easy DIY, and you can the part for about $300-350 online.
yeah its easy.i took it out & cleaned what buildup i found.reinstalled & seemed fine for about month.now its showing throttlebody code again.thx
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      06-23-2013, 10:10 PM   #4
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Originally Posted by N54 TuNeR View Post
yeah its easy.i took it out & cleaned what buildup i found.reinstalled & seemed fine for about month.now its showing throttlebody code again.thx
I think it's the actual electronics inside that wear out slowly, I don't think cleaning really helps. You will eventually just have to pony up for a new one. You could always also try to source a low mileage one from a wrecking yard. For the price of 1 new one, I would imagine you could 2-3 used ones. The DIY is easy enough, it could be worth it, especially if you don't plan on keeping the car forever.
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      06-23-2013, 11:25 PM   #5
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I replaced throttle body and codes came back. I think, ultimately, it may have just been a poor connection on one of the subconnectors of the JB4 install. I have several other threads about it on various forums and one person suggested cleaning the contacts and bending the pins a bit to get a more sold connection. Since doing that I haven't had the problem, but fingers still crossed. I think the old throttle body was probably fine...
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      06-24-2013, 01:18 AM   #6
joec500
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Quote:
Originally Posted by Indo Rider View Post
I replaced throttle body and codes came back. I think, ultimately, it may have just been a poor connection on one of the subconnectors of the JB4 install. I have several other threads about it on various forums and one person suggested cleaning the contacts and bending the pins a bit to get a more sold connection. Since doing that I haven't had the problem, but fingers still crossed. I think the old throttle body was probably fine...
Oh Man... Well hopefully the issue is resolved.
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      06-24-2013, 07:09 AM   #7
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Quote:
Originally Posted by Indo Rider View Post
I replaced throttle body and codes came back. I think, ultimately, it may have just been a poor connection on one of the subconnectors of the JB4 install. I have several other threads about it on various forums and one person suggested cleaning the contacts and bending the pins a bit to get a more sold connection. Since doing that I haven't had the problem, but fingers still crossed. I think the old throttle body was probably fine...
Thx ill give that a try 1st.

Quote:
Originally Posted by joec500 View Post
I think it's the actual electronics inside that wear out slowly, I don't think cleaning really helps. You will eventually just have to pony up for a new one. You could always also try to source a low mileage one from a wrecking yard. For the price of 1 new one, I would imagine you could 2-3 used ones. The DIY is easy enough, it could be worth it, especially if you don't plan on keeping the car forever.
Yeah im keeping car.I have looked into sourcing a junkyard salvage or buying used from one of those online autoparts store but not sure if they are reliable from some reviews i have read so.
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