1984 Chevy Cavalier, 2.0 TBI. 64k miles. New Plugs, Wires, fuel filter, oil change, oil filter, and air filter. Cleaned the throttle body out and injectors serviced. Still misfiring and shuddering when its IN GEAR and my foot is on the brake. if i do this for a while (2 mins or so) the check engine light comes on. When its in neutral its fine. Any advice? Planning on a new cap and rotor and ignition coil soon. Really hoping its not the whole distributor.
These codes came up
DTC P0300 Random Misfire
DTC P0174 Fuel Trim System Lean Bank 2