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L90 injector service L90 injector service or L90 engine adjustment should be done every 20,000 kilometers or once a year. If the L90 injector service is not done on time, it will cause damage to parts such as the catalytic converter coil, valves, or the engine itself. L90 injector service includes washing the injector needles, L90 throttle valve service, replacing spark plugs, and decarbonization and catalyst washing. L90 injector service should be done systematically and with special equipment and devices. In this video, we see all the steps of L90 injector service, which should be done professionally and by experienced personnel. #Tender90 #L90 #Car_Repairs #Driver_Student #Mechanic #Repair_Shop #Renault #Injector_Washing #Gas_Valve