Acceleration is hard to depress and rough when advancing or accelerating from full stop.
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2002 Lexus RX300 Question: My accelerator pedal is hard to depress when accelerating from full stop?
Answer #1patrick mannion from Greg Solow's Engine Room, March 28, 2011, 22:11Master
The accelerator cable may be failing, make sure the floor mat is not fouling the cable and finally perhaps someone has ill advisedly tried to adjust the idle speed by adjusting the throttle stop screw. It is not to be adjusted, should have a dab of yellow paint on the screw from the factory to show it has not been tampered with.