Hi Guys,
For your general information, I checked the actual operation of the purge valve, and mine cuts in after the engine has reached a certain operating temp, (not sure the exact temp as I didn't check it, but soon after the engine has run a little bit).
The Purge valve then operates continuously "pulsing" irrespective of the RPM. In otherwords it opens and closes on and off continuously, just sucking tiny amounts of vapours from the carbon canister, but only when the engine is actually running. It does not operate when the engine is stopped, even with the ignition on, although the positive is live with the engine ignition on.
I guess this works well, as it will never have any sudden drop in vacuum, causing further idle control issues.
Hope this info helps someone in the future.
Best wishes to all and thanks for all your help as always.
Martin
1997 +8 4.6ltr
MX5 ND
Touareg
