Would this be the same on mine? I dont have any noticable idling problems, however I did remove the oil cap while the car was running and it was hard to remove, I quickly put it back on as there was an air rush and the car sounded like it was going to stall. Could this be the same problem? I do sometimes think the car feels a little down on power possibly but I put it down to being a quattro and heavy?
i fitted another one today, on a red 57 plate. 76k.
had two fault codes in it.
one about "fuel system lean on idle" and an "idle speed above control limits" fault too.
paid a little more attention to the oil cap thing......
before i fitted it, with it idling, you literally couldnt remove the oil cap cus of the vacuum in the crankcase. then as i managed to unseat it there was a big rush of air and the engine really struggled to tickover at all!
after fitting the valve it was easy as pie to remove the cap, just as easy as when the engines switched off. and no noticable rush of air, but it did upset the idle slightly with the cap off but nothing like as bad as before!
after fitting it it seemed to start much better (before it cranked over just slightly longer than it should have to and was noticablely lumpy for the first 2-3 seconds of running) and ticked over much happier.