
Certainly a project

Moderators: RichardW, myglaren
Pah! I've driving BX diesels before for over 20 years!Citroenmad wrote:A diesel at last Tim, I didn't think you would ever do it![]()
Certainly a project
New probe fitted, plus new valeo radiator (thanks Ebay) and its no better, in fact its maybe worse, its now parked up until I can bear to look at it againCitroJim wrote:Tim, going back to your Xantia and a comment made in the CXM thread that it was great for a few minutes. That makes sense from what I observed on the Lexia as it warmed up.
When the engine was cold it ran lovely. The point is that when cold the ECU is running open-loop and disregarding the oxygen sensor as it's not hot enough to give a signal. Your problems start when the ECU switches to closed loop and starts to look for a signal from the sensor.
Yours looks wrong as it's almost static. The output from the sensor should slowly vary over a range of just under 100mV to well over 800mV; yours well stuck at around 450mV and varied by only tiny fractions from this.
I reckon a new sensor should help enormously. Thing is, when you replace it you need to do it with a Lexia connected to see if a new one gives the right signal.