- Engine vacuum leak: This can cause the engine to run lean and misfire, which can cause the car to jump or surge.
- Idle air control valve (IAC): This valve controls the amount of air that bypasses the throttle body at idle. If it is faulty, it can cause the engine to idle too high or too low, which can cause the car to jump or surge.
- Throttle position sensor (TPS): This sensor tells the engine control module (ECM) how far open the throttle is. If it is faulty, it can send the wrong signal to the ECM, causing the engine to run rich or lean and misfire.
- Spark plugs and wires: If the spark plugs are worn or the spark plug wires are damaged, the engine can misfire, causing the car to jump or surge.
Recommended solution:
- Have the car inspected by a qualified mechanic to identify the cause of the problem.
- Replace the faulty component(s).
