I have a 5th gen hatch with a 94GSR, it has 10.6:1 JE pistons, rings, stage 3 cluch, I/H/E, ect... will it be wise to reset the ECU , will this make the car run better if the ECU recognizes the upgrades? Im running 14.5 @ 95mph and i know it should be little better than that. Let me know please.

 

Yeah........(said in a Duh style)

Anytime you change something on the car you should reset the ECU and allow it the 10 mintue idle to relearn all sensors.

10 minute idle means leave it alone after you start it for the entire duration.

 

OK.... i didnt know that.

how would you go about doing that, which fuse do you remove?

 

It's under the hood by the battery. Backup/Radio 7.5 amp

Have your Alarm ready as it will go off once you put the fuse back in.

Or, you could pull the battery instead.

Either way make sure you leave it out for a good 10 solid counted seconds before reconnecting.

 

I thought you just disconnected the battery for 30mins or more then reconnect and let it idle for 8-10 mins. I was under the impression that disconnecting the battery for that time frame reset the ECU and the idle set the sensors. Correct me if I am wrong.

 

You are correct except for the disconnect time, you only need 10 seconds.

In all actuallity you should only need 1 second but, there have been times where residual power left in the system kept the ECU "alive". So, 10 seconds is all you need to make sure the ECU is fully reset.

EDIT: Re read your post and want to add. The idle isn't some controling device, the ECU controls everything and adjusts things accordingly (Idle Air Control Valve) once it plays with the sensors to know exacly how to control them


[Modified by Spade, 9:15 AM 1/8/2003]

 

Cool, thanks.....Hmmm Spade, I must keep that name in mind for all my Tech Q's. This is the 2nd time You have answered and clairified my tech garble. Thanks!

 

well i took out my batter tons of times, after indiglo install and stuff and had it idle for 15 min. so i gues i already reset the ecu.

 

I've been around long enough to see a lot of stuff.


Yup, you already reset your ECU.