Datalogging and ECU safety

Penn999 · 01-02-2011, 01:50 PM

I was told by some guys on e90 that running the datalogging wire out through the ecu was ok to do on a long term basis. I am hesitant to believe this bc of moisture damage to the ecu and its components. I want to begin datalogging on a regular basis and it seems to be a PITA to do all of the work involved in popping open the ECU. Is it recommended to just open the ecu every time I want to datalog or can I leave it cracked so the wire can hang out(so I can just pull the wire out and run it through the window/glove box)?

BTW: Anyone interested in some various OEM parts and random electronics, I just posted a bunch of stuff here http://www.e90post.com/forums/showthread.php?t=471502

e90TiAg335i · 01-02-2011, 01:54 PM

just run the cable through the firewall from the back of the ecu compartment into the car and then up into the glovebox. Then all you have to do is oven the glovebox.

Penn999 · 01-02-2011, 02:01 PM

Quote:

Originally Posted by e90TiAg335i

just run the cable through the firewall from the back of the ecu compartment into the car and then up into the glovebox. Then all you have to do is oven the glovebox.

Thats my plan, you still have to have the wire come out of the ecu white box, is there room for that wire? what work is involved? is that safe to do? It has so many latches on it because it isnt supposed to have any moisture in it. Has anyone experienced any problems?

forza1976 · 01-02-2011, 02:33 PM

Quote:

Originally Posted by Penn999

Thats my plan, you still have to have the wire come out of the ecu white box, is there room for that wire? what work is involved? is that safe to do? It has so many latches on it because it isnt supposed to have any moisture in it. Has anyone experienced any problems?

http://www.e90post.com/forums/showthread.php?t=65147

scottp999 · 01-02-2011, 02:35 PM

There is a hole in the bottom of the box. You run the cable into the cabin from there.

Penn999 · 01-02-2011, 02:36 PM

Quote:

Originally Posted by forza1976

http://www.e90post.com/forums/showthread.php?t=65147

Thats exactly what I was looking for.

Believe me, I always do searching b4 I ask. Just didnt find a DIY like this.

themyst · 01-02-2011, 02:37 PM

It will make the job MUCH easier if you pull the actual DME unit out and have an extra set of hands pulling the cable in from the passenger seat.

Penn999 · 01-02-2011, 02:39 PM

Quote:

Originally Posted by themyst

It will make the job MUCH easier if you pull the actual DME unit out and have an extra set of hands pulling the cable in from the passenger seat.

Thanks for the tip, def. would be a bitch by myself. Luckily I have some local tuners like myself that im sure wouldnt mind lending a hand.

forza1976 · 01-02-2011, 02:44 PM

I did this all by myself. It's simple. Once you put the cable through the specific hole it appears just under the dash. It's super easy.

Penn999 · 01-02-2011, 02:46 PM

Quote:

Originally Posted by forza1976

I did this all by myself. It's simple. Once you put the cable through the specific hole it appears just under the dash. It's super easy.

Thanks, someone seems to have taken(stolen!) my cable from my house, I guess I will have to go get a new one. Does best buy carry these? Only reason I ask is bc I got a gift card for xmas. I know I could go get another at radio shack.

Ilma · 01-02-2011, 04:06 PM

No moisture issues by running the cable into the glovebox.

That hole in the ECU compartment actually is a fan vent that dumps hot air from the ECU into the passenger compartment when the CPU reaches a certain temperature.

Mike@N54Tuning.com · 01-02-2011, 04:21 PM

Quote:

Originally Posted by themyst

It will make the job MUCH easier if you pull the actual DME unit out and have an extra set of hands pulling the cable in from the passenger seat.

+1 Pulling the ECU out completely is the way to go! Its actually simpler then you think.

Mike

dzenno · 01-02-2011, 04:54 PM

I have a wire coming out of the box (meth flow sensor wire) as well as USB + meth controller/pump wires going through the firewall...both work no issues

Penn999 · 01-02-2011, 06:27 PM

Quote:

Originally Posted by dzenno

I have a wire coming out of the box (meth flow sensor wire) as well as USB + meth controller/pump wires going through the firewall...both work no issues

good to hear, I will be ordering the Coolingmist, any heads up before I make the purchase? Brand wise...I will be using the solenoid.

01-02-2011, 01:50 PM	#1
Penn999 Lieutenant Colonel 52 Rep 1,661 Posts Drives: 335i coupe Join Date: May 2010 Location: VA iTrader: (3)	Datalogging and ECU safety I was told by some guys on e90 that running the datalogging wire out through the ecu was ok to do on a long term basis. I am hesitant to believe this bc of moisture damage to the ecu and its components. I want to begin datalogging on a regular basis and it seems to be a PITA to do all of the work involved in popping open the ECU. Is it recommended to just open the ecu every time I want to datalog or can I leave it cracked so the wire can hang out(so I can just pull the wire out and run it through the window/glove box)? BTW: Anyone interested in some various OEM parts and random electronics, I just posted a bunch of stuff here http://www.e90post.com/forums/showthread.php?t=471502 __________________ 07' MT, Quaife LSD, BMW Performance LED Steering Wheel, HPF FMIC, AA BOV, HPF Exhaust, DCI, Procede V5, AR Stage 1 oil cooler, AR OCC, AR CL DP's, Vishnu Meth Kit, UUC SSK+DSSR, UUC Shift knob, (19 inch)VMR V715's/Yokohama Advan AD08's, Hartge Pedals and Floor Mats. Awaiting Install: M3 Rear Subframe Bushings, Full M3 suspension bits, AST 4100's, DSS axles. Future plans: Vishnu Single turbo kit
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01-02-2011, 01:54 PM	#2
e90TiAg335i Major 127 Rep 1,151 Posts Drives: 10 e90 335i Join Date: Mar 2010 Location: jacksonville, FL iTrader: (10) Garage List 2010 e90 335i [7.00]	just run the cable through the firewall from the back of the ecu compartment into the car and then up into the glovebox. Then all you have to do is oven the glovebox. __________________ JB4, DP, VMR V710, Sonic Tuning S1 coilovers, Hybrid Ovations, Soundsplinter 10" and Zapco DC Ref amps
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01-02-2011, 02:35 PM	#5
scottp999 Brigadier General 136 Rep 4,764 Posts Drives: 4runner SR5 Join Date: Mar 2007 Location: MD iTrader: (2) Garage List 2007 BMW 335 [9.00]	There is a hole in the bottom of the box. You run the cable into the cabin from there.
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01-02-2011, 02:37 PM	#7
themyst Major General 189 Rep 6,631 Posts Drives: '16 MK7 GTI Join Date: Feb 2009 Location: NYC iTrader: (8)	It will make the job MUCH easier if you pull the actual DME unit out and have an extra set of hands pulling the cable in from the passenger seat. __________________ E90 LCI N54 6AT
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01-02-2011, 02:44 PM	#9
forza1976 Major General 3514 Rep 6,626 Posts Drives: BMW Join Date: Aug 2007 Location: 49456 iTrader: (13) Garage List 2022 BMW M3X [9.50]	I did this all by myself. It's simple. Once you put the cable through the specific hole it appears just under the dash. It's super easy.
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01-02-2011, 04:06 PM	#11
Ilma Colonel 193 Rep 2,854 Posts Drives: 2023 M4 Competition Join Date: Nov 2008 Location: Mississauga iTrader: (0)	No moisture issues by running the cable into the glovebox. That hole in the ECU compartment actually is a fan vent that dumps hot air from the ECU into the passenger compartment when the CPU reaches a certain temperature.
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01-02-2011, 04:54 PM	#13
dzenno Banned 286 Rep 5,876 Posts Drives: Join Date: Feb 2006 iTrader: (1)	I have a wire coming out of the box (meth flow sensor wire) as well as USB + meth controller/pump wires going through the firewall...both work no issues
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