Causes difficulty in setting base ignition timing of the car. The fuel economy of the car drops drastically. Because of this, the following can occur: 1. These operations are affected when a bad throttle position sensor feeds erroneous data to the car’s computer. The data provided by TPS is invaluable for proper starting, idling, and easy throttle response. All of this happens if the sensor is unable to detect the closed position of the throttle. What usually happens is that at high speeds, the butterfly valve inside the throttle may close up, and if the driver pushes on the pedal harder, the valve ‘pops’ open suddenly, giving the car an unintentional burst of speed. This is a particularly hazardous situation. Sudden Surge in Speed While Driving on the Highway The TPS can give a bad input, prompting the engine to stall. This can happen anytime, without any kind of warning, while driving or idling. Similar to getting jerks while accelerating, with a faulty TPS, the computer cannot tell if the throttle is fully shut when the car is idling. This problem usually comes in conjunction with the above one. Without proper inputs from the TPS, the on-board computer is unable to guide the engine to work at optimum levels. Bucking and Jerking/Hesitation while AcceleratingĪnother common symptom related to a bad TPS is the jerking of the car, especially when accelerating.
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