Fuel Injectors

WARNING: This page is about a different car, the 2008 Ford Econoline, 2008 Ford E450 Super Duty, and 2008 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Do not attempt to apply battery voltage to the fuel injector or damage to the fuel injector will occur.

NOTE: To prevent engine damage, do not use air tools to remove or install the fuel injectors.

The engine uses an electrohydraulic injector as part of its fuel system. This PCM/FICM-controlled injector uses high-pressure lube oil to provide the necessary force to inject fuel into the combustion chamber at pressures up to 144 mPa (21,000 psi) at rated horsepower.

The injector fits into a sleeved bore machined into the cylinder head. The injector bore intersects with a machined fuel passage that runs the length of the head. Each injector has 2 O-ring seals around the outer body, 1 above the fuel passage and 1 below. A fuel inlet port between the O-ring seals allows fuel under pressure to enter the pressure amplification area of the injector. High-pressure engine oil enters the injector through the top. The high-pressure oil rail assembly is mounted on top of the fuel injector.

Fig 1: Fuel Injectors

Courtesy of FORD MOTOR CO.

Item	Part Number	Description
1	-	Closing coil (part of 9E527)
2	-	Control valve body (part of 9E527)
3	-	Intensifier piston (part of 9E527)
4	-	Piston return spring (part of 9E527)
5	-	Plunger (part of 9E527)
6	-	Valve opening pressure spring (part of 9E527)
7	-	Needle (part of 9E527)
8	-	Opening coil (part of 9E527)
9	-	Spool valve (part of 9E527)
10	-	Case nut (part of 9E527)
11	-	Fuel strainer (part of 9E527)
12	-	Nozzle assembly (part of 9E527)