Advice on swopping ECU needed PLEASE.

[lakemaligne]

I am thinking of getting an ECU from a scrap yard to replace the one in my 1996 2Ltr petrol 406 to see if it cures a long standing fault . I would like to know whether it would just be a case of removing the old one and popping in the replacement ,or would i have to do some setting up of the replacement ECU.Would it cause any problems or damage my car in any way.

[Welly]

I'm not sure but you may need the keys too? because of the imobiliser? you may have the keypad imobiliser but I wonder if it's still 'coded' to the ECU?

Recently we've had a member with an HDI with jerkyness and it turned out to be (in part) the spare switches/plungers fitted to the brake and clutch pedals (for the cruise control option) - maybe worth a look there.

Your problem appears to me to be associated with the road speed over compensating a bit. There's all sorts of sensors on fuel injected cars like Road Speed, Air Temp, Air Mass, crank position etc.

I'd bet there's a duff sensor or some damaged wiring somewhere (finding it is another matter) I've not really heard of any ECU problems apart from maybe the odd corroded multi-plug that goes into the thing.

I can't really offer anything more to be honest.