XM V6 Bad Running

[Joe T]

Well I thought I would update this thread on progress, or the lack of it.

I removed the LHM res as suggested took aparts and cleaned the main engine loom connectors, also noted a couple of wires had been bypassed round the connector.
Also found the Lambda plugs. cleaned them to you never know etc.
Run a meter over the HT leads.

But the fault is exactly the same. I notice above that Temp sensors were mentioned, I tried swapping the two connector's round to see if it made a difference and it did not seem to.

I tried another person in the driving seat, at first he did not notice the fault then when accelerating to 60mph in 5th at about 2500 just as it warmed up off it went, we then went through the list of parts Plugs, Leads, Coil etc. I suggested he moves it up to 80 and it was fine. In slow traffic the problem is more pronounced as its just right for slow moving traffic in second nice and jerky.

So parts I have not replaced, Injectors, Lamda Sensor, Engine Loom, Temp Sensors, Throttle Body.

Any suggestions.
here is a link to my previuos post as I couldnt seem to update that.
http://www.frenchcarforum.co.uk/forum/v ... 900#104900