Citroen XM Forum

Hi looking for a carbon vapour canister for my 2.0 XM. Think I got to the root of lumpy tickover purge valve has suction but pipe going to it hardly any smell of petrol, but pull pipe under wing no vacuume but smell of petrol.
I went for a drive with purge valve blocked and nice steady tick over, so if anyone has one let me know how much you want for one or if someone can give me part no, to make it easier to search for one or mabe be an Xantia one could be made to fit.
Thanks
Tim

I don't completely follow your description of how you have diagnosed the fault, or whether you believe it to be the charcoal canister, or the purge valve, to be faulty.
The carbon canister captures the evaporated petrol vapour from the fuel tank (sealed system, no vent to atmosphere), when the car is parked, the purge valve seals the system at engine off and iirc...at high intake vacuum (idle).

If the canister is still sealed, it's ok, if cracked, faulty.
The purge valve should seal without power and open with power applied. I suspect it is stuck open /leaking, hence venting at idle creating an air leak into the engine, thus weakening the mixture causing the stumbling

The Citroen p/n for the canister is 150245...fits Xm/605 only.
The purge valve p/n is...Citroen 1628F0...Bosch 0280142157. Fits all injected Cits from Bx to Xantia/Xara, Pugs from 205 to 306/406...Fiat Scudo...and, importantly Saab 900/9000.

On "The Bay" is a chap breaking Saab 9000's, who supplied me with one, for very reasonable cost, a while ago.
I believe, on the Saab, the valve resides near the charcoal canister.

Yes sorry I didnt explain well. The purge valve works as it should opens when engine has started to warm, I was thinking of getting canister just in case bolts rusted on and just be my luck to split it getting off to replace pipe work. Thanks for part number will do a bit of research.
Tim