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liamd
4th November 2007, 11:59
I've replaced a few things on the engine and I'm looking to reset the ECU,. can anyone tell me how to do it, I've heard of different methods but which one is correct?
SNewham
4th November 2007, 12:00
Disconnect the battery for 5 mins then reconnect it.
liamd
4th November 2007, 12:36
The battery has been off for about a week now, someone told me that you have to have the ignition on when you re-connect it to reset the ECU.
Steve
4th November 2007, 13:01
search i covered it, if the battery has been out that long, plug it in start car and leave it idling for a good few mins then take for atleast a 15min drive.
VTR_Superstar
4th November 2007, 13:20
search i covered it, if the battery has been out that long, plug it in start car and leave it idling for a good few mins then take for atleast a 15min drive.

lmao yeah thats right. my mate has a mercedes Sl500 he had a few mods to his he went for that "drive" and the car forgot how to... power steering was delayed and his traction controll kept coming off and on... he said his back end was going everywhere lmao :D:y: :y: silly Car Brain!!
Steve
4th November 2007, 13:33
lmao yeah thats right. my mate has a mercedes Sl500 he had a few mods to his he went for that "drive" and the car forgot how to... power steering was delayed and his traction controll kept coming off and on... he said his back end was going everywhere lmao :D:y: :y: silly Car Brain!!

lmao good job a saxo doesnt have all these mod cons :panic:
Scottish_Gaz
4th November 2007, 23:51
what you mean re set it, why wud u reset a ecu? what that mean?
SaxoJamie
5th November 2007, 11:36
what you mean re set it, why wud u reset a ecu? what that mean?

He wants to reset it so it will benefit from the different pattern of airflow from any breathing mods he's fitted. e.g an induction kit, full exhaust system etc. Can't really explain it better than that tbh
pjsaunders06
5th November 2007, 11:40
i got told about this. for every breather mod you do you are suppose to reset the ecu as the air to fuel ratio has been affected. Once the ecu is reset it will measure the air coming in and adjust the fuel thus making your mods worth it as otherwise you could have a unbalanced air to fuel ration which in turn equals crap perfromance lol