a friend of mine took his 2005 Z to nissan to install his Popcharger and test pipes...
The guy there told him that he can raflash his ECU using a scanner they have...
Took him like 5 min without even driving the car, and my friend told me that he did feel the diff...

Is it possible to tune ur Stock ECU using a scanner ? i mean its a diagnostic tool...
what do you guys think ?

Cheers!

 

He probably advanced the timing a couple of degrees, that you can do!!!!!!!!!!! but i dont know of anything else. my tech did that to mine with the consult II, but i have to run 93 octane, otherwise the computer would retard the timing back(knock sensor you know). you do feel the difference though.

 

^ exactly , thats most probably what he did...
btw if u reset ur ECU u'll loose the reflash....

 

If u advance your timing 2 degrees then reset the ECU it goes back???

 

Resetting the ECU doesn't change the settings the ECU was flashed to.

 

Sooo anytime u make any ECU changes wether it be idle speed or timing advances with either a Consult or Cipher u are actually flashing the ECU?


If the ECU needs to be flashed that leads me to believe that its a EEPROM sorta like a bios chip on a motherboard for a computer. Pulling the power on the chip for however long will not change its program.

Or pulling the power on it could could erase and changed settings is my other guess.

 

I wouldn't really call it a reflash as all you're doing is changing a few base parameters (idle speed, ign timing, etc). Technically it could be considered a 'reflash', but most wouldn't.

For the OP's story there could've been an updated ECM program out for his car, but you can't really do much at all with the CONSULT-II beyond diagnostics (spent almost a whole day playing around with the thing back when I first started working at Nissan). Certainly no tuning performance-wise.

And correct, any changes you make to the ECM will not be lost if it loses power. Think of it as a flash drive of sorts.

 

+1 he probably did the idle air volume learning or something Maybe there was an ECM reflash like pmohr suggested but I dont recall one for the 350z I work @ nissan too... woooo