* Faulty throttle position sensor: The throttle position sensor (TPS) tells the engine control unit (ECU) how far open the throttle is. If the TPS is faulty, it can send an incorrect signal to the ECU, which can cause the engine to over-rev.
* Vacuum leaks: Vacuum leaks can cause the engine to run lean, which can lead to overheating and over-revving.
* Faulty ignition module: The ignition module controls the spark timing. If the ignition module is faulty, it can cause the engine to misfire, which can lead to overheating and over-revving.
* Worn camshaft lobes: Worn camshaft lobes can cause the valves to open and close incorrectly, which can lead to overheating and over-revving.
* Incorrect carburetor jetting: If the carburetor is jetted incorrectly, it can cause the engine to run rich or lean, which can lead to overheating and over-revving.
* Clogged fuel injector: Clogged fuel injectors can cause the engine to run lean, which can lead to overheating and over-revving.
* Weak valve springs: Weak valve springs can cause the valves to float, which can lead to overheating and over-revving.
* Excessive carbon buildup: Excessive carbon buildup in the combustion chamber can cause the engine to run hot, which can lead to overheating and over-revving.
