Porsche 944 Turbo Fuel Injector Replacement (1986 - 1989)

If your car is starting to run rough, getting horrible gas mileage or has an error code, there is a good chance it is time to replace the fuel injectors.
Modern fuel injectors are made of plastic. For this reason I do not recommend having them serviced or rebuilt. Older mechanical injectors opened by fuel pressure alone and were easier to service; newer injectors are made of plastic, need an electronic pulse from the ECU to open and are better replaced than sending them out for service.
A properly working injector will send a precise amount of atomized fuel into the induction system at a designated time. A weak or improperly working injector can do everything from send no fuel, to leak raw, non-atomized fuel into your engine.
Have a fire extinguisher handy and know how to use it. There will be some spillage of fuel as it's nearly impossible to prevent. Also, wear chemical resistant and proper eye protection. Make sure that you have plenty of paper towels or rags to help you clean up and dispose of them in accordance with your local regulations. Never store fuel soaked rags, as they can self-combust. Perform the injector removal in a clear, open, and well-ventilated space. In addition, it wouldn't hurt to have an assistant around in case there are any problems.
You are going to be opening holes that go into the engine. This being the case, before you begin, get a can of compressed air and blow all the dust and debris away from the injector ports.
Open the gas cap to relieve any residual pressure.
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