Have P0200 error code. Changed all wires and plugs. Cleaned all ejectors and replaced two that had error code for misfire. Still having issues. Anyone have similar problems. I have very low mileage (60,000k) and only drive locally about 1 or 2 miles each day. Have switched to premium gas and regularly put in gas treatment. Have checked all ejector for ohms, checked wires for 12v feeding ejectors. Looking for something else to try.