Q5l reversed and stepped on the brakes, and the speed was high and low.

The ignition coil failed and the throttle was stolen.

1, ignition coil failure. The ignition coil of q5l is faulty, resulting in insufficient ignition energy. When reversing and braking, the speed will go up and down. Check whether the ignition coil, resistance and insulation performance meet the requirements, and replace those that do not meet the requirements.

2. Curb stolen goods. Throttle stolen goods, resulting in abnormal mixture. Make the acceleration and deceleration operation of the car inflexible. Go to the 4S shop to remove the throttle assembly, and thoroughly clean and repair it with special cleaning agent.