ECU resetting

[losersk8er]

A while ago before the site was changed, there was a thread about resetting the ECU after every mod to your car. I just got my cat-back done today and want to reset it to ensure the best results. Uhm, im kinda a newbie so i dont know where the ECU's at exactly or exactly what was said on how to reset it. If someone could help that'd be sweet. thanx

[matts]

yea, i would definatly reset the ecu.
you can do it a few ways, disconnecting the battery will work. just pop off the negative terminal, then wait, then reconnect. the only downside is that you'll need to reset your clock/stereo
you can also pull the ecu fuse, which is in the fuse box under the hood. again, wait a few seconds before reconnecting
after everything is back in, start up the car and let it idle for a few minutes without touching the gas.

[losersk8er]

Thanx man, I think I'm gonna go with the ECU fuse because i'll probably never reset anything else that gets turned off.

[birdman]

A while ago before the site was changed, there was a thread about resetting the ECU after every mod to your car. I just got my cat-back done today and want to reset it to ensure the best results. Uhm, im kinda a newbie so i dont know where the ECU's at exactly or exactly what was said on how to reset it. If someone could help that'd be sweet. thanx



The thing with your 97 accord is it has obd2 ecu, which all of the 96-up honda/acura have. The computer will re-tune itself to its fuel-economy state in which it was designed for. Your best bet would be to do a obd2 to a obd1 conversion like the 94-95 accord, which is non-restriction and un-performance hindering. I'm going to do the same pretty soon.

[losersk8er]

yeah i thought about doin that before, but its jus one of those things i never got around too....i should probably still go for it tho

[Twistedframe]

What all is involved with doing a conversion like that?

[matts]

skunk2 has a conversion harness. that'll take all the wire mess out of it

[birdman]

i just tried to reset the ecu with taking the ecu fuse from under the hood.waited about 15minutes. then i let my car idle a few minutes. i test drove my car trying it at full-throttle. I didn't notice any gains or any more difference. the disconnecting battery process would be more practical. you actually know whether or not this thing worked. Even if it's only for about 1 trip's worth. I know my car ecu is obd2, but i do also know that disconnecting the battery and reset the ecu for this car will give a little boost, i tried many times before, but i needed some boost for this trip cuz i'll be flying w/ the car club. I can't wait for the obd2 to obd1 conversion. Probably my next mod for this car.

[Twistedframe]

Try this- Pull the radio backup fuse out from the box under the hood for 10 seconds and replace it. This will reset the ECU for sure, as this is the method that many if not all shops use. This is also the recommended way as printed in the chilton guide. I do this all the time, and it works.

Basically you won't feel any difference until the computer has had a chance to relearn your driving habits and recalibrate air/fuel curves. Give it about 20-30 miles and you will start to be able to tell.

[96cordlx]

Yeah and since the computer will "re-learn" you specific driving habits and "remember" them you should push your car pretty hard the 1st couple of times you drive it after re connecting everything and that way it won't bog or anything when you just step on it out of the blue

[losersk8er]

ok im confused as hell now, i disconnected the one that says ECU int he book....and you said somethin about the radio backup fuse, and someone else said to diconnect the battery.....did i do it wrong...or does it even make a difference since its gonna reset itself....

[Twistedframe]

There are multiple ways to do this. Basically, all you are doing is cutting power to the computer long enough to allow it to lose all of it's current settings.

You can disconnect the battery (requires 30 mins. of disconnection), pull the ECU fuse (requires 30 mins. of disconnection), or you can pull the radio backup fuse (requires 10 seconds of disconnection)

Dependinng on the time you want to spend on it, you choose which method is best or the fastest. :)

radio backup, in the fusebox under the hood, for me.

[losersk8er]

i get it now....damn 30 minutes i left it off for like five....i'll try that radio backup one and do it again later.

[5peedCoupe]

To reset the ECU, first make sure the engine is warm. Disconnect the battery OR pull the ECU fuse and leave it disconnected for 10 min. Then replace it and run the car at idle without touching the accelerator or steering wheel for 10 min. then turn the car off.

Now you can start it and it should be reset

[birdman]

Twistedframe: What do u think about the ecu conversion?? I know your is putting out 260whp, so im assuming must have done this mod. Every technician/street racer with 96-up honda/acuras know about the ob2 performing-hindering. I researched quite a bit on this topic, and it i really want to try it. So, since your ride seems the top performer for accords, im just curious. Damn, i really want my car to put out those kinds of numbers.