I've been experiencing a misfire when Idling since I got this car. It only happens about 20% of the time, typically the car starts and idles fine then after driving for a little while and stopping again it rears it's ugly head. any advice?
It could be literally anything in the ignition system or an electrical problem as well. Nobody on the internet is doing more than guessing since it requires physical diagnosis. If it happens when its parked I'd pop the hood and pull plug wires to see if you can at least the problem to a cylinder. I had a Honda that had really poorly designed new factory plug wires that were causing the problem. You're trying to conduct electricity from point A to B and anything imperfect in between can screw that up.