What is a typical indication of exhaust valve problems during engine performance?

A typical indication of exhaust valve problems during engine performance is lower than expected RPMs. This is because exhaust valves play a critical role in removing exhaust gases from the combustion chamber after the fuel-air mixture has ignited. If the exhaust valves are not functioning properly, such as being stuck, burnt, or improperly seated, the engine may struggle to expel exhaust gases effectively. This can create back pressure that impedes the intake of fresh air, resulting in less efficient combustion and ultimately leading to a reduction in RPMs. A drop in RPMs can be a significant indicator of engine inefficiency linked to faulty exhaust valve performance. Additionally, issues with exhaust valves may also contribute to other symptoms such as power loss or rough engine operation, but the immediate effect on RPMs is a key indicator of potential problems.