I'm currently having an idling issue, the car seems to be unstable and tries to stall albeit doesn't actually stall when I first start it. It drives like normal and the issue seems to go away after 30 mins driving but I want to sort it. It could be a leak somewhere but it could also be ignition so in the interest of reliability I think I should eliminate this too. What do I need to replace and at what cost? I'm not a mechanic lol so I will have to pay labour too, what's a fair price?