![]() A carburetor delivers the same amount of fuel and hopes it is enough to turn the engine or keep it running. There are no sensors, computers, or ways to make adjustments. The intake valve in each chamber opens, the fuel-air mix rushes in just as the piston rotates up, compressing the gaseous mix, and the spark plug fires to create combustion.Ĭarburetors are inefficient fuel delivery systems. As more demand is required of the engine (you put your foot on the gas), air gets sucked into the carb, and the fuel and air mixture gets sent to the engine cylinders via a small hole called a jet. Basically, fuel comes from a pump into a holding bowl in the carburetor. There are times when more pressure helps get a job done) How Does A Carburetor Work?Ī carburetor is a much less sophisticated form of fuel injection. (The difference is like placing your thumb over a garden hose, rather than just trying to clean the driveway with a simple trickle. ![]() ![]() This means that while the electronic fuel injectors spray the right amount of fuel into the engine in a sharper, more intense burst than the gentle mix of a fuel port in a carburetor. The PSI (pounds per square inch) for the EFI unit is 50-60PSI, versus 5 - 7PSI for older, carburated units. The ECM (electronic control module is a tiny computer that receives signals from sensors placed all over the engine and uses that information to calculate exactly the right amount of fuel a car needs to operate.Įlectronic fuel injection has a higher pressure point than a regular carburetor. Electronic fuel injection is precisely what the name implies, the ability of the car to electronically inject the precise amount of fuel needed to operate at peak efficiency.
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