The Throttle Body in Jeep Grand Cherokee vehicles is as a crucial component which controls the air that is allowed into then Jeep's engine, and thus, an important part of the fuel injection systems in vehicles. Located upstream or downstream of the air cleaner and before the intake manifold it has a butterfly valve that vary depending on the accelerator pedal. When the pedal is pushed more, it increases the air coming in through the valve while the sensors relays the information to the PCM in order to adjust the amount of fuel being supplied to the engine. Through the many years, there has been change of fuel injection systems from Throttle Body Injection (TBI) system to the more sophisticated multi-port fuel injection system in Jeep Grand Cherokee models. Present day throttle bodies incorporate Electronic Throttle Control (ETC), this is a substitute for mechanical connection of the accelerator pedal with the throttle plates through electronic signals to maintain greater sensitivity and interface with necessary safety components. High-Mileage Throttle Bodies are usually quite dependable, however, the expressed components may need occasional cleaning or replacement to remove the accumulated deposits which often results in the Throttle Body's degradation and which might affect the performance of Jeep Grand Cherokee Automobiles.
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