Car jumps when driven on an incline.
Read obd reader P0300 changed out 6 spark plugs to brand new found one coil that looked corroded, unplugged that coil to see if engine ran worse. No change in sound so I figured this cylinder is definitely the problem, changed that coil cleaned throttle body. Still getting same issue changed fuel filter fuel pressure is good. I feel I’ve isolated the problem to cylinder 4 which had corrosion but now am wondering what it could be