Hey guys. I rarely post on here, but now may very likely be one of those instances. I am now in a 2012 Convertible. I got it last year with 98k miles on it. I just surpassed 110k just a few days ago. Lately, my car has been developing some rough idling issues. It's giving me a check engine light. It was blinking at first, but it's gotten a bit bad enough to where the light is staying steady now. I can start the car up, but sometimes it can take a few seconds to crank on. Before that, there...

2012 Ford Mustang Convertible rough idling