No pattern as to when this happens
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2000 Chrysler 300M Question: Occasionally while driving, accelerator pedal will not depress until take ft off
Answer #1patrick mannion from Greg Solow's Engine Room, November 22, 2011, 23:33Master
The accelerator pedal on a lot of modern cars is not a cable like older cars, it is a sensor that increases voltage or sends a signal to the computer as to the driver's input. If the computer sees the engine's coolant temperature is too cold or it is "bad" for the engine to accelerate harshly the computer over rides the drivers desire to put the accelerator pedal to the floor board. The computer can also over ride accelerator pedal input to save the transmission or when traction control is exercised.
Replydavemcd, November 23, 2011, 11:31Rookie
Thanks. That's interesting. Could the computer keep the pedal from moving at all ? It will not budge even a quarter inch.