Quote Originally Posted by Paul in NZ
could the exhaust( you have a hole in your exhaust right??) be the culprit...maybe for peace of mind get a muffler bandage just to rule that out for now??
The hole isnt actually particularly large tbh, it's after the cats and centre silencer/muffler - basically in a position where it shouldnt be affecting the idle.

The big clue here is that the idle doesnt change when you open the oil filler cap - the car's definitely running lean as you can see the plugs starting to get glazed...

I'm just frustrated that the dealer + parts places all close at the damn weekend - what kind of customer service is that?