What could be an indication that an engine’s intake manifold is leaking?

A leaking intake manifold can disrupt the air/fuel mixture that enters the engine, leading to several performance-related issues. When the manifold is leaking, it can allow unmetered air to enter the system, which can cause rough idling due to an improper air-fuel ratio. As a result, the engine may not run smoothly and can exhibit a noticeable loss of power. This occurs because the engine is unable to combust the fuel efficiently, leading to poor fuel economy as well. These symptoms collectively indicate that something is wrong with the intake system, with the intake manifold being a potential culprit.

This focus on engine performance symptoms aligns with the common issues associated with intake manifold leaks, making it a clear indicator for diagnosing engine problems related to the air intake system.