Does anyone know what benefits are obtained from resetting the ECU? I drive a 92 KR Verada, and I've often wondered if resetting the ECU is worth it, or causes more trouble than anything else.

Has anyone reset their ECU and noticed a change? How did you reset it?

Since I got my Verada, the engine has been very sluggish on take offs, and often shifts at strange points. Would resetting the ECU help this?

There are no benefits...there's no need to reset it


No it's an old wives tale mate...it doesnt actually help anything. You should *never* have to reset the ECU.

The ECU uses the data from the sensors to create the optimal settings all the time. The ecu is constantly redoing the settings and updating them, making them better and better from the data from the sensors. If it was adding more fuel at a colder temp because of more dense air, it will then change it later when there is less dense air...when it detects it, it changes it accordingly and stores these values. It's constantly changing. If you reset the ecu...it has nothing to fall back on and has to work from default values which then it needs to recollect data and start it's fine tuning alllll over again. This is why when you reset an ECU it takes time before it runs smoothly again.

So by resetting an ecu you can effectively make it take longer to learn new mods than if you left it alone.

Resetting an ECU is an old wives tale and does nothing of any real worth.

http://www.tmo.com/theory/myth/ecureset.htm

Hey KB, got anything / any thoughts on resetting the ISC?
Had some info that said something like "ground a wire in the engine bay"... but could never figure out which bloody wire it was talking about!

I cant find my magna manuals man lol..otherwise I'd write out the procedure....I'll see if I can find em.

Killbilly,

If you have a trouble code, you repair or replace the part, will the ECU no longer have that same trouble code? Or, will you need to reset the ECU (disconect negative battery cable for 20 sec) and clear that trouble code from the ECU memory? If the later, then the only benifit would be to clear old trouble codes from memory. The downside of reseting is going to be the ECU relearning everything from scratch.

TG

You stil have to reset the ECU after fixing the problem. So yes all it does is make it relearn problems. so pretty useless

Killbilly,

If you have a trouble code, you repair or replace the part, will the ECU no longer have that same trouble code? Or, will you need to reset the ECU (disconect negative battery cable for 20 sec) and clear that trouble code from the ECU memory? If the later, then the only benifit would be to clear old trouble codes from memory. The downside of reseting is going to be the ECU relearning everything from scratch.

TG

If you have a trouble code, resetting the ecu will not get rid of it on it's own. You have to fix the problem that is causing the trouble code, then reset it.

If you just reset it it'll just have the same error code again when the problem re-occurs.

And yes the ECU will drop back to it's fail-safe defaults which means the car has to relearn everything all over again.