this problem started about a week ago. Car overheated (girlfriends car, she was driving it at the time) I added coolant and drove it for a few mins. It was misfiring sputtering really bad and idling low after about 5 mins of driving it it was random misfiring codes were P116BB and cylinders 3&4 misfiring and ignition coil4 malfunctioning (can’t remember exactly how it was stated. Anyway I changed all the plugs and the bad coil( didn’t have enough money for all 4) did a coolant flush added new coolant check for bad hoses or coolant leaks didn’t see any. Drove much better but still stalls at idle. If I’m at a red light light turns green I give it gas it either hesitates/ shutters to the point of almost stalling or stalls. Stalls only intermittently otherwise car drives great now PCV valve was pretty clogged but still was able to hear slight rattle, replaced it anyway. PCV hose is ok. I’m not a mechanic don’t have pressure testing tools to check for vacuum or coolant leaks NOTE: car has over 200k Miles has oil, but oil leaks possibly bad valve cover gasket there’s oil gunk all over motor. Also seems to be burning oil. Tested for bad ignition switch tested ok PLEASE HELP! thank you

Forgot to mention also replaced MAF sensor and air filter added half a bottle of seafoam some in gas tank some in engine wanted to add in booster line but very hard to acces