hi I have had a few problems with my car which I have fixed but now I have a emission light on my dash stuck on. I had no 4 cylinder misfire which was a coil pack so I changed all four called the aa out they cleared engine management light off dash but after driving for 2 mins my emissions light came on an wont go off? has anyone else had this problem an if so what was up with yours. also I have changed my plugs an now have bosch FR78X does anyone else no here use them as after doing searches I couldn’t find them. should I use other iridium plugs an do plugs do anything to performance as my car is mapped. any help appreciated.