The fuel injectors in your Toyota works to deliver fuel to the combustion chamber of your engine to allow it to function properly. A pump works to send pressurized fuel from your fuel tank to the engine where it is distributed to each cylinder. The fuel mixes with air and this mixture is what enters the combustion chamber. Depending on your injection system, you might have a continuous injection where your fuel injectors send fuel through the entire time your engine is running. The timed injection system delivers fuel in bursts to match the timing of the induction stroke of your cylinders. Your vehicle's engine performance can be compromised when there are faulty fuel injectors, so it's important to pay attention to some symptoms that yours might be failing. Your engine might idle roughly because the RPM might drop below the correct level. Worn out injectors also can cause issues with the cylinders and cause them to have issues firing. Gasoline can start to leak out of your injectors as well. If you notice these symptoms, it's important to invest in new OEM fuel injectors for your Toyota so it can run correctly. You can find high quality parts for your Toyota here on our webstore.