This service is a component of a general tune-up. The vehicle's fuel delivery and fuel return line are opened. These lines are connected to a high power pumping system. We use a super detergent additive. The process removes particles trapped in the individual injector inlet screen, and removes dirt jammed into the injector nozzle. The detergent is non-flammable and is capable of breaking down carbon deposits on intake valves and the combustion chamber. The detergent then moves downstream and cleans the oxygen sensors and the catalytic converter. The overall result restores the precision of the fuel injector, substantially reduces emissions, and eliminates operational flaws, without major disassembly or new parts.