- Spark system: Worn spark plugs, faulty spark plug wires, or a weak ignition coil can cause misfires, resulting in hesitation and tachometer jumps.
- Air intake system: A dirty air filter, clogged air intake hose, or faulty throttle body can restrict airflow, leading to hesitation and tachometer jumps.
- Exhaust system: A clogged catalytic converter or exhaust pipe can cause the engine to run inefficiently, resulting in hesitation and tachometer jumps.
- Transmission: A faulty torque converter or transmission issue can cause the vehicle to hesitate and experience tachometer jumps while using cruise control.
- Electrical issues: Loose or corroded electrical connections, a faulty crankshaft position sensor, or a problem with the engine control unit (ECU) can cause hesitation and tachometer jumps.
- Vacuum leak: A vacuum leak can cause a lean air-fuel mixture, leading to hesitation and tachometer jumps.
