by Dahloan Hembree
the black sports car. image by Yuri Bizgaimer from Fotolia.com
Injector O-rings are flat plastic or rubber rings on a vehicle’s fuel injectors. The injector O-rings provide vacuum pressure for the injectors to function properly so that outside air is not leaking into the injectors. They also prevent the car from losing oil. Bad fuel injector o-rings can damage a car over time and inhibit vehicle performance.
Idling and misfires
If your car is idling, too fast, or failing, this could be an indication that your vehicle’s fuel injector o-rings are faulty.
When performing an under-hood check, inspect the fuel injectors. If they are leaking, this is a sign that the fuel injectors need to be replaced. If this is the case, the O-ring fuel injectors do not provide a proper seal. If you are having difficulty finding the o-rings, first look for the fuel injectors. There will be a metal tube that holds the fuel injectors in place. At the bottom of the fuel injector, you will see the circular o-rings. They are held in place by a spring clamp.
Injector leaks or spray
When idling, look under the hood. See if there is any leakage or mist from the fuel injectors. If so, this may be an indication that it is time to repair the fuel injector o-rings.
Sometimes the only way to make sure fuel injector o-rings are not damaged is to remove and inspect them. If the plastic or rubber ring is cracked or stretched, it needs to be replaced. Cracking also indicates a worn O-ring.