The key to installing, troubleshooting, and repairing your own electrical system is simply making sure you have the right information and steps, and paying very close attention to detail through every step of the process. At a minimum, you should use a shop manual for your vehicle to analyze the engine wiring diagram and try to identify the wires by color under the hood. Unfortunately, the colors of the wire insulation may fade over time, so if your car is older, this task may be made more difficult.
Throttle body fuel injection systems sort of work how carburetors did, but without the carburetor. Instead of each cylinder getting its own fuel injector, there’s only one fuel injector that goes to a throttle body. The fuel mixes with air in the throttle body and then is dispersed to the cylinders via the intake valves.
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