I have a 2011 Chevy Impala. When accelerating from a stop it will frequently stutter then jerk forward. The first time this happened I thought someone had rear-ended me.
I’ve been to the dealer several times about this however they say they cannot isolate the cause. More importantly I can’t seem to get the vehicle to repeat this problem when I’ve brought it to the dealership.
How many miles are on the odometer?
What can you tell us–specifically–about the vehicle’s maintenance?
Is the Check Engine Light lit up when this problem occurs?
This means that instead of having a throttle cable from the gas pedal to the throttle body, your vehicle has the throttle pedal position sensor that sends a signal to the computer, and the computer then opens the throttle plate via the electronic throttle body.
So the problem might be with the throttle pedal position sensor, the computer, or the electronic throttle body.