Is resetting the ECU after mods unneccesary?

craniac24 · 04-13-2010, 12:19 AM

I'm wondering how much reality there is in the idea that the ECU must be reset in order for it to "learn" to adapt to new mods. The reason I'm asking is that after I had my intake and exhaust installed, I experienced some pretty respectable gains immediately...without resetting the ECU.

For example, if I were to take my car to a much different altitude, I would imagine that the ECU would adjust "on the fly" so to speak...much like it would adjust to new mods changing the A/F ratio.

What are your thoughts? Is the need to reset the ECU a myth?

efuseakay · 04-13-2010, 12:21 AM

You don't really have to... people reset so the ECU relearns faster AFAIK.

Modshack · 04-13-2010, 12:38 PM

Quote:

Originally Posted by efuseakay

You don't really have to... people reset so the ECU relearns faster AFAIK.

Exactly. You don't "Have" to as the ECU will re-learn over anywhere from 20-50 miles. By disconnecting, you dump the Long term fuel trims and start again at "0"

This shot shows Long term trims at a -3% (rich) correction. Typical 370 settings will show a Rich correction from there to -10%. Ideally you want to be at Zero, but that's hard to achieve without tuning, custom MAF tubes etc..

vipor · 04-13-2010, 01:52 PM

Sounds like resetting the ECU would be most necessary before tuning then? Not necessarily bolt-ons.

Well, tuning would probably reset that field anyways you would think..

Vegitto-kun · 04-13-2010, 06:42 PM

GT-R technician that worked on my 370 for the intakes told em that resetting WILL make it learn quicker but it is so little that it is pointless to go through the hassle of redoing all your settings

04-13-2010, 12:19 AM	#1 (permalink)
craniac24 Enthusiast Member Join Date: Mar 2010 Location: Ronkonkoma, NY Posts: 339 Drives: 2010 PG Roadster Rep Power: 402	Is resetting the ECU after mods unneccesary? I'm wondering how much reality there is in the idea that the ECU must be reset in order for it to "learn" to adapt to new mods. The reason I'm asking is that after I had my intake and exhaust installed, I experienced some pretty respectable gains immediately...without resetting the ECU. For example, if I were to take my car to a much different altitude, I would imagine that the ECU would adjust "on the fly" so to speak...much like it would adjust to new mods changing the A/F ratio. What are your thoughts? Is the need to reset the ECU a myth? __________________ 2010 6MT PG Roadster w/Sport & NAV. Stillen Exhaust, Stillen GIII Intake, Eibach Springs, H&R Spacers 15f/20r, SPC Rear Camber Kit. Thanks to Vinny Ten Racing!

04-13-2010, 01:52 PM	#4 (permalink)
vipor A True Z Fanatic Join Date: Aug 2009 Location: Euless, TX [ DFW ] Age: 42 Posts: 13,531 Drives: Nismo 09-0183 QAB Rep Power: 49	Sounds like resetting the ECU would be most necessary before tuning then? Not necessarily bolt-ons. Well, tuning would probably reset that field anyways you would think.. __________________ 2009 NISMO # 0193 \| QAB \| Albums! \| 05.04.10 (Dynojet) 291.94hp/248.28tq Oil Cooler (DIY) \| Custom Headlights \| GTSPEC Braces \| F.I. Long Tube Headers Last edited by vipor; 04-13-2010 at 01:52 PM. Reason: I fail at spelling.

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04-13-2010, 12:21 AM	#2 (permalink)
efuseakay Enthusiast Member Join Date: Mar 2010 Location: The DAYNGA ZONE! Posts: 404 Drives: 2010 G37xS Sedan Rep Power: 15	You don't really have to... people reset so the ECU relearns faster AFAIK.

04-13-2010, 06:42 PM	#5 (permalink)
Vegitto-kun A True Z Fanatic Join Date: Feb 2010 Location: USA Posts: 2,011 Drives: 09 370Z Rep Power: 262	GT-R technician that worked on my 370 for the intakes told em that resetting WILL make it learn quicker but it is so little that it is pointless to go through the hassle of redoing all your settings