Mitsubishi Mirage Technica 1998 Automatic 1.8L. When I purchased this car from its previous owner, I immediately had to fix a few things to get it running smoothly. Got the spark plugs replaced, wheels aligned. A while after that my car overheated on me, the temperature gauge wasn't working correctly unbeknownst to me so I had to get the head to a machine shop and all that. The misfiring problem started after the overheat fix. So far I have replaced ignition coils and ignition cables. Also used a Seafoam Fuel Injector cleaner on it. Spark plugs are still the same. It still misfires. There's no smoke, no coolant leak, etc. It's consuming a lot more gas than it used to. The misfires occur idling, when trying to maintain speed, when accelerating from low speeds - this in particular the engine struggles to get enough power for a few seconds. I'm thinking TPS sensor, or a compression leak or a clogged fuel filter. I have no idea to be honest and I don't want to keep taking it to the shop and not getting the problem solved. Any ideas?