I read the DTC codes on a 2003 Jetta. P0300, P0301, P0302, P0304. Misfires on 3 cylinders.
I replaced all spark plugs and wires, cleared the codes and tried to drive the car, but the throttle won't engage in gear and the motor sound very rough unless I rev it in higher rpms.
What should I do next? Replace the coil pack? Any other suggestions?
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