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Solution for stumble/hesitation at accel/low rpm.....
Ok, So after months of diagnostics....and changing plugs (twice), O2 sensors, 3 EGR valves, 1 PCV, throttle body clean, 1 coil....the dealer was able to find the reason for the hesitation at low acceleration, typically at 2200 rpm. The car would give a feel of missfire, stumble........THE REASON WAS THE GAS PEDAL. The voltage sender on the gas pedal was not sending the correct voltage (or resistance) to the unit in the trunk (receiver unit).
Have your dealer check that before you spend any money......and change the pedal assembly.OOuuuuuuuuuuuf finally resolved.
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