Please help end the controversy

tommyguns · 06-19-2009, 08:47 PM

Hi Folks,
I need a little help! I'm going to install my Nismo CAI tomorrow and would like a definitive answer to my question. Do you need to disconnect the battery?

frost · 06-19-2009, 08:49 PM

no. despite the 100 posts below mine that will say otherwise, there is no electrical concern about installing a CAI.

Modshack · 06-19-2009, 09:00 PM

There is no controversey. You may choose to or not. Adaptation will occur a little quicker if you do.

tommyguns · 06-19-2009, 09:03 PM

Quote:

Originally Posted by Modshack

There is no controversey. You may choose to or not. Adaptation will occur a little quicker if you do.

Good enough! Thanks.

tommyguns · 06-19-2009, 09:05 PM

One other question. Is only having 163 miles to soon for the install or does that not factor in. Thanks in advance.

frost · 06-19-2009, 09:08 PM

Doesn't matter

nogoodname · 06-19-2009, 09:53 PM

..have no worries and enjoy ur install and intake system....ok

tommyguns · 06-19-2009, 10:01 PM

Thanks will do!

k20z3 · 06-19-2009, 10:02 PM

It is good to reset the ECU (taking off battery) but its not needed just helps your Vq get used to something new

nogoodname · 06-19-2009, 10:09 PM

try the no need to disconnect battery ecu reset......it sounds like a cheat code for these cars...lol

_______________________________________________

Ok here are the instructions for the easy ECU reset as posted on g35driver.com ( I have changed a few things specific to the G37)

Read the process a few times before you try to do this its ALL ABOUT TIMING:

1) With the key in your pocket/car, push the Engine Start button TWICE (so the car is fully on, but not started)
2) Within three seconds of the car "ON" (again NOT started), Floor (all the way down) and Release the gas pedal fully 5 times within 5 seconds. Do not do this too fast.. 1..2..3..4..5
3) Wait 7 seconds then floor the gas pedal and hold for 10 seconds. After that 10 seconds the Check Engine Light will start to blink slowly.
4) Release the pedal and floor it down once again and hold for 10 seconds. After these 10 seconds the check engine light will disappear then begin to flash much more rapidly. After you have done the following turn the car off and then back on. The ECU is now reset!!

Again, this reset is all about timing, if it does not work for you, try try again until it does! I JUST did this and it works just fine!

Here is some more information regarding the ECU and why you reset it: (This information was found online from another auto forum, much of this information I have read before)

Resetting your ECU. Your ECU is your cars brain. It tells your engine what to do and how to do it based on tons of readings it recieves along with how much throttle is being applied and so on.
After you perform any modification to your car. You should reset your ecu so it can clear its memory and re-learn and adapt to the new parts. Instead of having it try to optimize in with its old parts. Its best to reset and let it learn from the new setup....instead of trying to get it to forget the old.

It can be easily done by unplugging the negative battery cable connection. Try to leave it off as long as possible. Into the night and possibly next morning if you can.

Then you connect the cable back on. Then start the car outside , let it run till its full warm. Normally 5-10minutes during the summer. Some wait till they hear the fan kick on....but you really just need to see the temp gauge at its normal operation position. Do not touch the gas pedal. Then once warmed.

Shut off and use when you are ready.

Also some like to take the car out and run it hard around 3times. Basically 1st through 3rd like you are racing. Of course this sounds kinda weird , I dont know if to believe this. But it cant hurt and it sounds logical , so it doesnt get some weak run and try to learn from that , you immediatly feed it some hard runs to set it self to and you should be good.

You also have to reset it for every mod. I also do it for every season change. This also lets your car adjust to the environment , different humidites and oxygen levels and densities. All are different variables that can effect your cars performance. So to take full advantage , you again want your car to learn and base its settings off a smaller period of time. So resetting it in lets say winter, its like its whole life was driven in the winter , and so on and so forth. Instead of having it try to adapt from its summer time conditions over to the winter...its best to just start fresh.

-- NOTE , do not try resetting your ecu when you have any sort of fuel additives or things in your car that you wouldnt normally have. So fuel cleaners , higher octane fuel , different fuel than you normally run...dont try this then.

MightyBobo · 06-20-2009, 01:02 AM

Modshack · 06-20-2009, 06:18 PM

Just an FYI...I reset my ECU today with the battery disconnect method after putting my new intake on. Since I have a Scangauge mounted I can monitor Short and long term fuel trims. The ECU accumulated enough data at about exactly the 20 mile point (mixed driving) to set the LTF (Long term, PARTIAL THROTTLE) trims. Data will continue to accumulate in the EPROM to fine tune those settings but basically the car adapts pretty quickly to changes you make..

zZSportZz · 06-20-2009, 06:45 PM

Honestly, I expected more drama in this thread

I was guessing the topic would be something like."which is better xbox 360 or ps3!?!?!?!"

But back on topic, either method...I believe you end up in the same place.

frost · 06-20-2009, 06:51 PM

Whelp, this looks about done then, we are all in agreement.

06-19-2009, 08:47 PM	#1 (permalink)
tommyguns Track Member Join Date: May 2009 Location: New York Age: 65 Posts: 914 Drives: 370Z/Sport/Black/MT Rep Power: 17	Please help end the controversy Hi Folks, I need a little help! I'm going to install my Nismo CAI tomorrow and would like a definitive answer to my question. Do you need to disconnect the battery?

06-19-2009, 08:49 PM	#2 (permalink)
frost Retired admin Join Date: Dec 2008 Location: Winterfell Posts: 106,613 Drives: Your Wife Crazy Rep Power: 0	no. despite the 100 posts below mine that will say otherwise, there is no electrical concern about installing a CAI. Last edited by frost; 06-19-2009 at 08:52 PM. Reason: Rephrase

06-19-2009, 09:00 PM	#3 (permalink)
Modshack A True Z Fanatic Join Date: Mar 2009 Location: Greenville NC Posts: 2,883 Drives: 370Z Sport Rep Power: 976	There is no controversey. You may choose to or not. Adaptation will occur a little quicker if you do. __________________ Steal my car! (SOLD)...Now Porsche Cayman S Oil Cooler DIY: Here!

06-19-2009, 10:02 PM	#9 (permalink)
k20z3 A True Z Fanatic Join Date: May 2009 Location: Denver CO Age: 33 Posts: 2,146 Drives: 2006 Civic SI HFP Rep Power: 405	It is good to reset the ECU (taking off battery) but its not needed just helps your Vq get used to something new __________________ 2006 RALLYE RED HONDA CIVIC SI HFP Clint's Helpful Photoshop Hints!

06-20-2009, 01:02 AM	#11 (permalink)
MightyBobo A True Z Fanatic Join Date: Feb 2009 Location: Las Vegas, NV Posts: 8,465 Drives: No cars; only bikes Rep Power: 52	__________________ I don't own a car anymore.

06-19-2009, 09:05 PM	#5 (permalink)
tommyguns Track Member Join Date: May 2009 Location: New York Age: 65 Posts: 914 Drives: 370Z/Sport/Black/MT Rep Power: 17	One other question. Is only having 163 miles to soon for the install or does that not factor in. Thanks in advance.

06-19-2009, 09:08 PM	#6 (permalink)
frost Retired admin Join Date: Dec 2008 Location: Winterfell Posts: 106,613 Drives: Your Wife Crazy Rep Power: 0	Doesn't matter

06-19-2009, 09:53 PM	#7 (permalink)
nogoodname Lifetime Premium Join Date: Nov 2008 Location: Montreal Posts: 22,357 Drives: E46 M3 Rep Power: 1765	..have no worries and enjoy ur install and intake system....ok

06-19-2009, 10:01 PM	#8 (permalink)
tommyguns Track Member Join Date: May 2009 Location: New York Age: 65 Posts: 914 Drives: 370Z/Sport/Black/MT Rep Power: 17	Thanks will do!

06-19-2009, 10:09 PM	#10 (permalink)
nogoodname Lifetime Premium Join Date: Nov 2008 Location: Montreal Posts: 22,357 Drives: E46 M3 Rep Power: 1765	try the no need to disconnect battery ecu reset......it sounds like a cheat code for these cars...lol _______________________________________________ Ok here are the instructions for the easy ECU reset as posted on g35driver.com ( I have changed a few things specific to the G37) Read the process a few times before you try to do this its ALL ABOUT TIMING: 1) With the key in your pocket/car, push the Engine Start button TWICE (so the car is fully on, but not started) 2) Within three seconds of the car "ON" (again NOT started), Floor (all the way down) and Release the gas pedal fully 5 times within 5 seconds. Do not do this too fast.. 1..2..3..4..5 3) Wait 7 seconds then floor the gas pedal and hold for 10 seconds. After that 10 seconds the Check Engine Light will start to blink slowly. 4) Release the pedal and floor it down once again and hold for 10 seconds. After these 10 seconds the check engine light will disappear then begin to flash much more rapidly. After you have done the following turn the car off and then back on. The ECU is now reset!! Again, this reset is all about timing, if it does not work for you, try try again until it does! I JUST did this and it works just fine! Here is some more information regarding the ECU and why you reset it: (This information was found online from another auto forum, much of this information I have read before) Resetting your ECU. Your ECU is your cars brain. It tells your engine what to do and how to do it based on tons of readings it recieves along with how much throttle is being applied and so on. After you perform any modification to your car. You should reset your ecu so it can clear its memory and re-learn and adapt to the new parts. Instead of having it try to optimize in with its old parts. Its best to reset and let it learn from the new setup....instead of trying to get it to forget the old. It can be easily done by unplugging the negative battery cable connection. Try to leave it off as long as possible. Into the night and possibly next morning if you can. Then you connect the cable back on. Then start the car outside , let it run till its full warm. Normally 5-10minutes during the summer. Some wait till they hear the fan kick on....but you really just need to see the temp gauge at its normal operation position. Do not touch the gas pedal. Then once warmed. Shut off and use when you are ready. Also some like to take the car out and run it hard around 3times. Basically 1st through 3rd like you are racing. Of course this sounds kinda weird , I dont know if to believe this. But it cant hurt and it sounds logical , so it doesnt get some weak run and try to learn from that , you immediatly feed it some hard runs to set it self to and you should be good. You also have to reset it for every mod. I also do it for every season change. This also lets your car adjust to the environment , different humidites and oxygen levels and densities. All are different variables that can effect your cars performance. So to take full advantage , you again want your car to learn and base its settings off a smaller period of time. So resetting it in lets say winter, its like its whole life was driven in the winter , and so on and so forth. Instead of having it try to adapt from its summer time conditions over to the winter...its best to just start fresh. -- NOTE , do not try resetting your ecu when you have any sort of fuel additives or things in your car that you wouldnt normally have. So fuel cleaners , higher octane fuel , different fuel than you normally run...dont try this then.

06-20-2009, 06:18 PM	#12 (permalink)
Modshack A True Z Fanatic Join Date: Mar 2009 Location: Greenville NC Posts: 2,883 Drives: 370Z Sport Rep Power: 976	Just an FYI...I reset my ECU today with the battery disconnect method after putting my new intake on. Since I have a Scangauge mounted I can monitor Short and long term fuel trims. The ECU accumulated enough data at about exactly the 20 mile point (mixed driving) to set the LTF (Long term, PARTIAL THROTTLE) trims. Data will continue to accumulate in the EPROM to fine tune those settings but basically the car adapts pretty quickly to changes you make.. __________________ Steal my car! (SOLD)...Now Porsche Cayman S Oil Cooler DIY: Here! Last edited by Modshack; 06-20-2009 at 06:21 PM.

06-20-2009, 06:45 PM	#13 (permalink)
zZSportZz A True Z Fanatic Join Date: Mar 2009 Location: Maryland Posts: 1,095 Drives: 370z Blk on Blk 6MT Rep Power: 18	Honestly, I expected more drama in this thread I was guessing the topic would be something like."which is better xbox 360 or ps3!?!?!?!" But back on topic, either method...I believe you end up in the same place.

06-20-2009, 06:51 PM	#14 (permalink)
frost Retired admin Join Date: Dec 2008 Location: Winterfell Posts: 106,613 Drives: Your Wife Crazy Rep Power: 0	Whelp, this looks about done then, we are all in agreement.