97 Toyota Camry Has been having issues lately. First it started to miss fire a lot kept getting the code p1300 so i was advised to get a tune up i did that. Tune up included spark plugs changed, wires changed, mostly the electric stuff. They also noticed that the catalytic converter went bad i think it started to hear up to roughly 700F.. After thous two things done the car still kept miss firing so they tested if the coil was bad changed it out with a good it still didn't fix the problem so they suggested the ECM was bad... Already a super pricey repair i just decided to find a used one wasn't about to throw in 300 dollars for a new one so found the one for my model make etc with same OEM changed it out still didn't fix the problem it's like no one can figure out why the spark plugs keep miss firing. If anyone else has any great ideas or things to look into just leave a comment.