How to Disassemble a Fuel Injectorby Peter Grant
You might need to disassemble your fuel injector if it is dirty or clogged. A clogged fuel injector reduces its efficacy of fuel distribution. By disassembling it, you can see if it is capable of being cleaned or if you need to replace it. The disassembly procedure is fairly straightforward and requires no tools.
Unscrew the cap from the nozzle at the bottom of the fuel injector.
Remove the cap that sits on top of the nozzle by pulling it straight off.
Tap the bottom of the injector assembly on a flat surface to knock loose the internal spring and shims of the injector.
Tap the top of the fuel injector assembly to knock loose the two internal shims that sit on top of the spring to complete the disassembly.