Speedo stuck at 160mph during casual driving

Soden82 · 09-10-2018, 03:37 PM

Hey guys,

2011 335i xdrive
JB4 plus MHD backend
FBO

Along with some boost targeting issues, my car just did something very strange. I couldn't get a picture of it because it ended up fixing itself but while driving at 40-50mph on the highway the speedo suddenly pegged to 160mph and stayed there for about a minute.

Nothing else on the car was affected and the car felt completely normal. Then as I was trying to take a picture of it the blinkers blinked once, then the speedo went back to reading my actual speed and the blinkers blinked twice.

Thinking it's a jb4 issue since the blinkers flashed like they do when my oil gets up to temp.

Anyone else ever have this happen?

weehe126 · 09-10-2018, 03:47 PM

JB4 resetting itself. Clean the canbus and ground connections.

Turbod · 09-10-2018, 04:53 PM

For sure the JB4. I had it happen once. I sent a photo to the girlfriend and she freaked out thinking I was taking photos at 160+ mph.

Soden82 · 09-10-2018, 04:59 PM

Quote:

Originally Posted by Turbod

For sure the JB4. I had it happen once. I sent a photo to the girlfriend and she freaked out thinking I was taking photos at 160+ mph.

Is that the only time that happened?

Turbod · 09-10-2018, 05:38 PM

Quote:

Originally Posted by Soden82

Is that the only time that happened?

Yeah

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Soden82 · 09-10-2018, 05:45 PM

Quote:

Originally Posted by Turbod

Quote:

Originally Posted by Soden82

Is that the only time that happened?

Yeah

Attachment 1897161

Pretty much what mine looked like. As long as it's not an indicator of something terribly wrong with the jb4

RoarinForeign · 09-10-2018, 08:44 PM

JB4 issues aside, that's a pretty cool picture. No gas, 160mph at 2k rpm

09-10-2018, 03:37 PM	#1
Soden82 Major 495 Rep 1,229 Posts Drives: 2011 BMW M3 Join Date: Jun 2017 Location: Boston iTrader: (1) Garage List 2011 BMW M3 [0.00]	Speedo stuck at 160mph during casual driving Hey guys, 2011 335i xdrive JB4 plus MHD backend FBO Along with some boost targeting issues, my car just did something very strange. I couldn't get a picture of it because it ended up fixing itself but while driving at 40-50mph on the highway the speedo suddenly pegged to 160mph and stayed there for about a minute. Nothing else on the car was affected and the car felt completely normal. Then as I was trying to take a picture of it the blinkers blinked once, then the speedo went back to reading my actual speed and the blinkers blinked twice. Thinking it's a jb4 issue since the blinkers flashed like they do when my oil gets up to temp. Anyone else ever have this happen? __________________ 2009 BMW 335i 6MT big single (eventually) For now... MHD tuned VRSF Race IC DCI ATM exhaust
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09-10-2018, 03:47 PM	#2
weehe126 Brigadier General 1189 Rep 3,228 Posts Drives: 2017 340i Join Date: Apr 2014 Location: San Antonio iTrader: (2)	JB4 resetting itself. Clean the canbus and ground connections.
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09-10-2018, 04:53 PM	#3
Turbod Major 400 Rep 1,210 Posts Drives: 2014 E84 X1 35i M Sport Join Date: Mar 2015 Location: Oregon iTrader: (0)	For sure the JB4. I had it happen once. I sent a photo to the girlfriend and she freaked out thinking I was taking photos at 160+ mph. __________________ 2011 E92 335i \| 11.7@125 SOLD 2017 Camaro SS \| 12.7@114 SOLD 2019 Audi TT RS \| 10.5@130 SOLD 2020 F97 X3M \| 11.0@123 2023 G80 M3 xDrive
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09-10-2018, 08:44 PM	#7
RoarinForeign Private First Class 40 Rep 126 Posts Drives: 2011 e92 335i xdrive Join Date: Feb 2016 Location: Western MA iTrader: (0)	JB4 issues aside, that's a pretty cool picture. No gas, 160mph at 2k rpm
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