Does anyone know information on replacing the ecu? LOOK ON PAGE 2!

[katconcarne 0]

hi guys, does anyone know if it's possible to reset the ecu's adaptations?

The latest from the garage is that because my car was running fine with 6 bent exhaust valves for the past two years, the ecu was compensating by altering the fuel mixture and now i've had the headwork done, it's not bounced back so is running really lean (not running under load at all now). So if the ecu can be reset to learn the adaptations again, the problem may be solved without a new ecu having to be sourced.

Hope someone knows,

Thanks, Katie

PS, I tried to search for answers to this, but i kept getting a message that i'm not authorised to use the search facility, so sorry if this has been asked before (@)<br /><br />Last edited by: katconcarne

[vr6madmike 0]

Im not 100% sure but have heard that if you disconnect your battery for a while (more than 10mins) the ECU forgets everything it has "learned" and goes back to its factory parameters, oh and I think they have disabled the search because it was causing problems.

Mike

[katconcarne 0]

disconnecting the battery doesn't work. I've got a mate with a sharan vr6 ecu he says i can have, will this work?

[Petesvw 0]

Hey kat, search option is offline atm due to the probs it was causing.

Re-setting the ECU can be done by disconnecting the battery! It needs to be off for half an hour, then re-connect it and turn the ignition on to the first click, just so the lights are on. (do not start) Then leave a further half hour. This will re-calibrate the ECU.

If you didnt do the igniton part kat, this may be why it didn't work!

Afaik, sharans are OBD2, so it wouldn't work on your car : (

[VR6Pete 1,455]

Surely if the head has been off, you would have had the battery disconnected for more than half an hour?

[katconcarne 0]

yep, disconnecting the battery didn't reset the adaptations, but not tried the ignition trick, so will give that a go, thanks petes!

[lee060 3]

bent valves!!?? :S VAG com or other suitible diagostics should be able to reset basic setings , ive used the kit we have at work to reset basic settings on a mk4 gti 1.8t

Liam

[nickvr 0]

the ignition trick? it work?

[katconcarne 0]

i'll let you know if the ignition trick works tomorrow, my car is locked away at a garage, so i'll have to scrounge a lift there in the morning to try it out.

fingers crossed!

[katconcarne 0]

bugger, re-set the ecu following petes instructions, but still running wrong fuel mixture, so will have to ask auto electrician next week if re-setting this way actually re-sets adaptations or just basic settings, me thinks a new ecu is in order! doh!

[VR6Pete 1,455]

I find it very hard to beleive you will need a new ECU TBH...

If that doesnt work, give Vince @ Stealth Racing a call... He's a very helpfull chap who should be able to assist you, probably saving you a quid or 2!

Pete

[katconcarne 0]

spoken to the experts and had a vw specialist auto electrician look over absolutely everything and vagcom comes back with no faults, resetting the ecu has made her run slightly better but she's getting worse again, so not apermanent fix. The auto electrician is positive it's the ecu at fault and says i need a replacement. The code off mine is 021 906 258 CH, does anyone know the best place to source a second hand one?

I've found a few with the letters CP at the end, will any other vr6 obd1 ecu do? or does it have to be the CH?

Hope someone knows!

Cheers