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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > If you installed FF wires, click here



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      06-18-2014, 10:27 PM   #1
Jsoboti
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If you installed FF wires, click here

Installed flex fuel wires today and immediately got the code 2C86, code is...

" Boost pressure sensor, plausibility: Pressure before throttle valve too low when engine not running "

"Charge Air Pressure in Comparison to Barometric Pressure Too Low"

Its pretty obvious that clipping the two green wires coming from the TMAP sensor messed something up, or possibly that the TMAP sensor itself is having some issues but ive been emailing with Terry for quite some time and after sending a multitude of photos and double and triple checking all connections, we both seemed to be stumped.

Anyone else experience this or something like it? or just have some knowledge/advice for me?

thanks
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      06-19-2014, 08:15 AM   #2
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They work great for me. I didn't get any errors at all. It really sounds like you didn't get the 2 green wires coming from the MAP twisted back together properly or the plug on the MAP is having an issue. Make sure the wires are pushed in to the plug all the way.
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      06-19-2014, 08:25 AM   #3
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      06-19-2014, 09:49 AM   #4
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I didnt twist the green wires together fully and that caused some errors probably the wires arent twisted on properly on your end
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      06-19-2014, 12:59 PM   #5
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Do you have the stock charge pipe? Have you checked to see if you have any leaks? Are you sure you plugged all the sensors into the right spots?
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      06-19-2014, 03:02 PM   #6
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Quote:
Originally Posted by weehe126 View Post
Do you have the stock charge pipe? Have you checked to see if you have any leaks? Are you sure you plugged all the sensors into the right spots?
Yeah checked the charge pipe, took the JB4 off and everything is running fine. Sending the JB4 back into BMS for a check from them
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