Chrysler PT Cruiser has Throttle Body which works to control the amount of air that enters the engine, it is also involved in fuel injection system. Sitting between the air cleaner and intake manifold it is equipped with a butterfly valve that changes its position with the accelerator pedal. On a closer look you realize that as the pedal is pressed the valve opens and the more air comes into this compartment, while the sensors are sending the signal to the Powertrain Control Module (PCM) telling it to send more fuel into the system. Chrysler PT Cruiser vehicles has gone through change of control system from mechanical throttle control to electronic throttle control abbreviated as ETC has contributed to the reliability in the control system as well as the interfaces of safety features. Of course, earlier models have primarily incorporated Throttle Body Injection (TBI), while today's models predominantly involve multi-port fuel injection that is independent of the throttle body. High mileage Chrysler PT Cruisers may have worn or clogged throttle bodies even though the PT Cruiser is considered one of Chrysler's most dependable automobiles to date so, inspection/cleaning or replacement of the throttle bodies is imperative to assure engine performance.
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