Question: JB4 N55 Stage 2 flexfuel/e85 wires installation

SMOKE TR335 · 05-22-2013, 07:18 PM

Having trouble locating the fuel pressure rail sensor for the N55. Anyone can help out?

Jdub679 · 05-24-2013, 02:59 PM

the sensor is behind the plastic cover that covers the top of the engine. It's not visible. You're gonna have to reach into the back and feel around for it.

On my car, I was able to find it standing on the driver's side. If you lift the plastic cover up slightly, you'll gain more access underneath it. Feel around for the connector, which is large (like on the flex fuel wiring).

SMOKE TR335 · 05-24-2013, 07:23 PM

Quote:

Originally Posted by Jdub679

the sensor is behind the plastic cover that covers the top of the engine. It's not visible. You're gonna have to reach into the back and feel around for it.

On my car, I was able to find it standing on the driver's side. If you lift the plastic cover up slightly, you'll gain more access underneath it. Feel around for the connector, which is large (like on the flex fuel wiring).

Do you recall what side the push tab is located? I believe I may have located the sensor but couldn't get it to budge. Its raining right now and will work on it tomorrow. Thanks for the help.

Jdub679 · 05-24-2013, 07:39 PM

Quote:

Originally Posted by SMOKE TR335

Do you recall what side the push tab is located? I believe I may have located the sensor but couldn't get it to budge. Its raining right now and will work on it tomorrow. Thanks for the help.

I'm not absolutely sure, but I think it's right on top. Take a look at the flex fuel sensor included with the new wire. It should be identical to that.

bdoooh · 05-25-2013, 12:16 PM

It might just be easier to remove the plastic cover. If you remove the passenger side strut bar it should come right off. I recently did this to unplug the o2 sensors when doing a DP install. Literally takes an extra 5 minutes. Just be sure you have an E18 torx to remove the strut bar, it's not common.

SMOKE TR335 · 06-05-2013, 03:13 AM

Update: Found it. Thanks guys

avol3xo · 07-21-2013, 01:21 AM

Edit: figured it out. Had to reread instructions, deleted question.

Randy7fx · 07-19-2014, 06:34 PM

Sorry to resurrect this old thread, but wondering if anyone has any additional insight into finding the sensor on an E84 N55 engine. Have been looking/feeling around for about 45 minutes, but either I don't know what I am feeling for or just haven't been able to find it. Getting frustrated! Any help?

Thanks.

SMOKE TR335 · 07-19-2014, 10:06 PM

Quote:

Originally Posted by Randy7fx

Sorry to resurrect this old thread, but wondering if anyone has any additional insight into finding the sensor on an E84 N55 engine. Have been looking/feeling around for about 45 minutes, but either I don't know what I am feeling for or just haven't been able to find it. Getting frustrated! Any help?

Thanks.

Wow, almost forgot about this thread. Randy, not sure how much of the engine bay is different from the e90, but I remember the way I found the sensor was by following the wire until it led me to the sensor. It's in a crevice where it won't be visible unless you lift the cover, but you can reach it from the drivers side. The push tab was facing the drivers side and I used my thumb to push the tab while yanking it out. The other comments helped me a bunch when I was doing this, hope this helps in some way and good luck to you!

Jsoboti · 07-20-2014, 12:51 AM

Quote:

Originally Posted by Randy7fx

Sorry to resurrect this old thread, but wondering if anyone has any additional insight into finding the sensor on an E84 N55 engine. Have been looking/feeling around for about 45 minutes, but either I don't know what I am feeling for or just haven't been able to find it. Getting frustrated! Any help?

Thanks.

Can you post a picture of your engine compartment? Trying
To see if it's the same as the E9X series.

Randy7fx · 07-20-2014, 07:57 AM

Quote:

Originally Posted by Jsoboti

Can you post a picture of your engine compartment? Trying
To see if it's the same as the E9X series.

Here you go. Thanks for the replies.

Should I just continue to watch her try to find it all day??

UGH! Apparently I can't post pics...

Randy7fx · 07-20-2014, 08:01 AM

Quote:

Originally Posted by SMOKE TR335

Wow, almost forgot about this thread. Randy, not sure how much of the engine bay is different from the e90, but I remember the way I found the sensor was by following the wire until it led me to the sensor. It's in a crevice where it won't be visible unless you lift the cover, but you can reach it from the drivers side. The push tab was facing the drivers side and I used my thumb to push the tab while yanking it out. The other comments helped me a bunch when I was doing this, hope this helps in some way and good luck to you!

Thanks. Hopefully this helps. Once I find the sensor, is there some give to allow me to pull it out? Or will I need to unplug and plug without being able to see it, just by feel?

Randy7fx · 07-20-2014, 09:07 AM

Update...found the sensor, but am now having a hell of a time removing it with the tab. I am sure it is just a matter of time and continued playing with it, but man is this frustrating!

Jsoboti · 07-20-2014, 10:21 AM

Quote:

Originally Posted by Randy7fx

Update...found the sensor, but am now having a hell of a time removing it with the tab. I am sure it is just a matter of time and continued playing with it, but man is this frustrating!

There's a delicate balance between yanking too hard on the wires and getting it off. I put my fingers on the tan and the back of my hand against the wires and pulled it off that way, basically using the wires coming out of the sensor to pull it off

Randy7fx · 07-20-2014, 11:08 AM

Thanks. I am continuing to try. Question for you. Can the car be driven with the flex fuel wires attached to the JB4, but NOT attached to the car? So if I am ultimately not able to figure this soon, can I still drive the car or would I need to remove the jb4 in order to drive it?

SMOKE TR335 · 07-20-2014, 01:56 PM

Quote:

Originally Posted by Randy7fx

Thanks. I am continuing to try. Question for you. Can the car be driven with the flex fuel wires attached to the JB4, but NOT attached to the car? So if I am ultimately not able to figure this soon, can I still drive the car or would I need to remove the jb4 in order to drive it?

You'll get the half engine light and no boost if you drive without the wires attached. Feel around the sensor and compare it to the jb4 connector for an idea of how to take it out. Practice with the jb4 connector push tab and get ur hand used to that awkward pulling motion. Gather yourself, take a deep breath, and try again. You can do it!!!

popwarfour · 12-13-2016, 10:26 PM

Here are some pictures I took during my install since I couldn't find any good ones. Notice that I remove the passenger strut bar and only moved the cover forward about two inches. I think it's impossible without doing this and it also makes installing the 2nd TMAP sensor easier.

Turbod · 12-15-2016, 01:20 AM

This thread is 3 1/2 years old...

Diox · 12-15-2016, 06:50 PM

Thanks for the pic 👍I'll be needing it soon

Diox · 12-21-2016, 03:47 PM

Also to whoever is doing this in the future, the easiest way I got it was leaning forward from the center, squeezing the little shitty tab and pulling it out.

Getting it form the side is impossible for me. (removed rear cover/left strut)

05-22-2013, 07:18 PM	#1
SMOKE TR335 Higher than 9k RPM 16 Rep 66 Posts Drives: Red Eyes Black Dragon Join Date: Nov 2012 Location: Flushing/Queens, NY iTrader: (2)	Question: JB4 N55 Stage 2 flexfuel/e85 wires installation Having trouble locating the fuel pressure rail sensor for the N55. Anyone can help out? __________________ I have a hole in my exhaust Last edited by SMOKE TR335; 05-23-2013 at 10:13 PM..
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05-24-2013, 02:59 PM	#2
Jdub679 Captain 88 Rep 644 Posts Drives: 2011 BMW 335i coupe M Sport Join Date: Jan 2011 Location: Irvine, CA iTrader: (1)	the sensor is behind the plastic cover that covers the top of the engine. It's not visible. You're gonna have to reach into the back and feel around for it. On my car, I was able to find it standing on the driver's side. If you lift the plastic cover up slightly, you'll gain more access underneath it. Feel around for the connector, which is large (like on the flex fuel wiring).
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05-25-2013, 12:16 PM	#5
bdoooh Captain 112 Rep 969 Posts Drives: 2014 SSII M5 CP Join Date: Feb 2011 Location: Ohio iTrader: (2)	It might just be easier to remove the plastic cover. If you remove the passenger side strut bar it should come right off. I recently did this to unplug the o2 sensors when doing a DP install. Literally takes an extra 5 minutes. Just be sure you have an E18 torx to remove the strut bar, it's not common.
	Appreciate 0 Quote

06-05-2013, 03:13 AM	#6
SMOKE TR335 Higher than 9k RPM 16 Rep 66 Posts Drives: Red Eyes Black Dragon Join Date: Nov 2012 Location: Flushing/Queens, NY iTrader: (2)	Update: Found it. Thanks guys __________________ I have a hole in my exhaust
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07-21-2013, 01:21 AM	#7
avol3xo Captain 59 Rep 733 Posts Drives: 2008 E92 M3 Join Date: Jul 2012 Location: Atlanta, GA iTrader: (1) Garage List 2008 BMW [0.00]	Edit: figured it out. Had to reread instructions, deleted question. __________________ 2011 BMW 335i E92 Vermillion Red, 6MT [SOLD] 2008 BMW M3 E92 Alpine White, 6MT
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07-19-2014, 06:34 PM	#8
Randy7fx Enlisted Member 2 Rep 47 Posts Drives: 2014 X1 Join Date: Jan 2014 Location: Charlotte, NC iTrader: (0)	Sorry to resurrect this old thread, but wondering if anyone has any additional insight into finding the sensor on an E84 N55 engine. Have been looking/feeling around for about 45 minutes, but either I don't know what I am feeling for or just haven't been able to find it. Getting frustrated! Any help? Thanks.
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07-20-2014, 09:07 AM	#13
Randy7fx Enlisted Member 2 Rep 47 Posts Drives: 2014 X1 Join Date: Jan 2014 Location: Charlotte, NC iTrader: (0)	Update...found the sensor, but am now having a hell of a time removing it with the tab. I am sure it is just a matter of time and continued playing with it, but man is this frustrating!
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07-20-2014, 11:08 AM	#15
Randy7fx Enlisted Member 2 Rep 47 Posts Drives: 2014 X1 Join Date: Jan 2014 Location: Charlotte, NC iTrader: (0)	Thanks. I am continuing to try. Question for you. Can the car be driven with the flex fuel wires attached to the JB4, but NOT attached to the car? So if I am ultimately not able to figure this soon, can I still drive the car or would I need to remove the jb4 in order to drive it?
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12-13-2016, 10:26 PM	#17
popwarfour Enlisted Member 0 Rep 31 Posts Drives: 2011 335 xdrive Join Date: Jun 2016 Location: vermont iTrader: (0)	Here are some pictures I took during my install since I couldn't find any good ones. Notice that I remove the passenger strut bar and only moved the cover forward about two inches. I think it's impossible without doing this and it also makes installing the 2nd TMAP sensor easier.
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12-15-2016, 01:20 AM	#18
Turbod Major 396 Rep 1,210 Posts Drives: 2014 E84 X1 35i M Sport Join Date: Mar 2015 Location: Oregon iTrader: (0)	This thread is 3 1/2 years old... __________________ 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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12-15-2016, 06:50 PM	#19
Diox Private First Class 24 Rep 122 Posts Drives: 335i xDrive 2011 6MT Join Date: Aug 2016 Location: 11414 iTrader: (0)	Thanks for the pic 👍I'll be needing it soon
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12-21-2016, 03:47 PM	#20
Diox Private First Class 24 Rep 122 Posts Drives: 335i xDrive 2011 6MT Join Date: Aug 2016 Location: 11414 iTrader: (0)	Also to whoever is doing this in the future, the easiest way I got it was leaning forward from the center, squeezing the little shitty tab and pulling it out. Getting it form the side is impossible for me. (removed rear cover/left strut)
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