A fuel injection pipe is used in diesel engine, which can sustain high internal pressure is provided. It has a thick double pipe structure and comprises an inner pipe and an outer pipe. An inner pipe is formed out of a seam-welded pipe made of a high tension steel plate that has a thickness of 0.4 to 1.5 mm. An outer pipe is formed out of a thick steel pipe made of the same material with the inner pipe or of carbon steel.
Fuel Injectors are actuators controlled by a vehicles computer. All fuel injectors are solenoids consisting of a coil of wire and moveable electromagnetic valve. A fuel injectors resistance is measured using an ohmmeter. Fuel injectors are complex devices with internal critical parts and tolerances.