2008 Chevrolet Impala Fuel Injector

You should not strike or jolt a sensor, and remove any dirt, grease, etc. from the mounting surface, position the sensor horizontally on the mounting surface, point the arrow on the sensor toward the front of the vehicle, tighten all of the sensor fasteners and sensor bracket fasteners to the specified torque value before applying power to a sensor.

If the fuel injectors are found to be leaking, the engine oil may be contaminated with fuel.

You should use care in removing the fuel injectors to prevent damage to the fuel injector electrical connector pins or the fuel injector nozzles. Do not immerse the fuel injector in any type of cleaner. The fuel injector is an electrical component and may be damaged by this cleaning method.

You will need to remove the fuel rail, the fuel injector retaining clip, the fuel injector, the fuel injector upper O-ring, and the fuel injector lower O-ring.