What occurs when exhaust gas flow is restricted due to exhaust system issues?

When exhaust gas flow is restricted due to problems within the exhaust system, the primary consequence is a loss of engine power. This is because an engine relies on the efficient expulsion of exhaust gases to maintain optimal performance and operation. When the exhaust flow is impeded, it creates back pressure, which can diminish the engine's ability to draw in fresh air for combustion. This impairs the engine's overall performance, leading to a noticeable decrease in power output.

In addition to power loss, restricted exhaust flow can also lead to issues such as overheating, poor fuel efficiency, and delayed throttle response, but the most direct and immediate effect is a reduction in engine power. Maintaining a properly functioning exhaust system is crucial for the overall health of the engine and its efficiency.