Proper functioning of the fuel injectors is crucial to engine performance and efficiency. They are responsible for delivering of fuel to the engine as a fine mist through tiny apertures. Over time, the apertures can get clogged, thus impairing performance. It is essential to get your Toyota fuel injector inspected and if required replaced to improve fuel efficiency and performance. If you have starting or idling troubles, increased fuel consumption, fuel odor inside or outside the car and poor emission tests then it is time to replace the fuel injector and fuel injector gasket.