So I've had my e30 for about a year and its had 4 codes pop up with my chec engine light one for my Cam position sensor, knock sensor for cyl 1-3, air intake temp sensor, and O2 sensor. The Engine is an m52 swapped with an obd1 harness, m50 intake manifold, and recently it started to run weird like its running on like 5 cylinders or possibly misfiring. So I replaced the cam position sensor and the car will misfire periodically now at idle, and it still gives the same check engine codes, and when little throttle is applied and the car will shake and sound like the engine is fighting itself. But then at times it will be fine so I don't what move to make next.