Suzuki Grand Vitara rough idling with steady engine light and gray exhaust fumes on Suzuki Grand Vitara

Some Suzuki Grand Vitara owners report experiencing rough idling accompanied by a steady engine light and gray exhaust fumes. These symptoms may be attributed to several potential issues, including vacuum leaks, which are commonly known to cause rough idling. Additionally, problems with spark plugs can also contribute to this condition. An ignition coil issue may lead to a steady check engine light, poor engine performance, and increased emissions. Furthermore, a clogged exhaust gas recirculation (EGR) valve can result in poor engine idling and a lack of power. Lastly, an imbalance in air, fuel, and spark can disrupt optimal ignition, leading to rough idling. It is recommended that affected owners have their vehicles inspected by a qualified mechanic to diagnose and resolve these issues promptly, ensuring the continued performance and efficiency of their Suzuki Grand Vitara.