Anyone know how to do this, and does it really make a difference to do it after a performance mod? Thanks guys.

 

Just remove the negative battrey cable for like an hour... But most usually remove it when they go to bed and then reconnect it in the morn.


I think this is right but I have been wrong before.

 

I think all you have to do is unplug the battery for a little while. Then, reconnect it and start the car. Let it idle until the engine warms up.

 

Cool, I'll try that , Thanks n/m

 

Go to this link and it will tell you how to reset your ECU http://web2.airmail.net/scutchen/max...aintenance.htm

I have tried the battery thing and never got it to work, but I might not have left the terminal off long enough. Anyway it is easier to just take follow the directions in the link above.
From my personal account on resetting the ECU after mods:
Well, after I reset my ECU it seems it takes my ECU some time to become use to the new mods. It just seems like the longer they are on my car the better it starts to run later down the road. I don't know enough technical info to explain this, but I think the ECU takes into account the new mods and slowly makes the car more efficient with these mods....

 

does doing this really help anything? when and how?

 

If you add new mods, resetting the ECU will allow it to 'learn' and adapt to them. The ECU is not simply a controller. It actually adapts to conditions, driving style, etc.. For instance, if you add an intake, the ECU will recognize the increase in input air flow and will adjust the fuel mixture appropriately.

 

hmmmmmm, you sure? at first will the car lose performance because it hasn't learned yet right? will the car do better as time goes on? how long does it take? is anyone a nissan tech here??

 

I am not a nissan tech (like they are good for anything anyway), but I have noticed with my intake that my car started performing better after about 1 tank of gas maybe a little more. So my guess is the ECU learns and adapts to your new mods within 300 miles are so. At least this is what I have seen with my car>>> Any techs out there????