Could be Lambda sensor playing up.
Check-Plugs, Leads, Distributor Rotor Arm, Fuel Pressure Regulator, Injectors.
Overfuelling not rings or valve guides from what you described.
Check-Plugs, Leads, Distributor Rotor Arm, Fuel Pressure Regulator, Injectors.
Overfuelling not rings or valve guides from what you described.