Jsvine

So yesterday I went to warm up my car with my electric fans off, per usual because I removed my thermostat. I had went inside my house to do something then got distracted and took longer than I had anticipated. When I had returned to my car the oil temp was around 150 Celsius which is ~300f (this is the highest temp I?ve ever heard of or seen a SR20DET reach). So I turned off my car and let it cool down to around 90 Celsius which is ~200f and refilled the coolant because it had all evaporated (the radiator pressure cap did not release but all my coolant was gone and no sign of coolant on the ground). Now after this event I have a backfire/misfire issue above 4k. What could overheating to that temp have damaged to cause this misfire issue?