* Loss of power: This is the most noticeable effect. The engine will produce less power overall because one cylinder isn't contributing its share of the combustion process. This might be a significant drop in power, or a more subtle decrease depending on the engine and the load. Acceleration will be sluggish.
* Rough running or misfires: The engine will run unevenly and may vibrate more than usual. You might hear a misfire – a distinct popping or sputtering sound from the exhaust. This is because the power strokes are inconsistent.
* Reduced fuel efficiency: With a cylinder not firing, the engine is less efficient at burning fuel. You'll likely see a decrease in gas mileage.
* Check engine light: The car's onboard diagnostic system (OBD-II) will almost certainly illuminate the check engine light. This will indicate a fault code related to a misfire in a specific cylinder.
* Exhaust emissions increase: Unburned fuel and other byproducts from incomplete combustion will increase in the exhaust, potentially leading to higher emissions.
* Engine damage (potential): If a cylinder fails due to a mechanical problem (like a broken piston ring or valve), continued operation could cause further damage to the engine. This is why it's crucial to address a misfiring cylinder promptly.
The severity of these symptoms depends on several things:
* Which cylinder failed: In a multi-cylinder engine, the impact might be less noticeable if it's a non-critical cylinder.
* The cause of failure: A simple issue like a fouled spark plug might be easily fixed, while a more serious mechanical problem requires a major repair.
* Engine management system: Modern engines have sophisticated computer systems that can compensate somewhat for a misfiring cylinder. However, they can only compensate so much before the problems listed above become apparent.
In short, a non-functioning cylinder will lead to a noticeable decline in engine performance and efficiency. It's essential to get the car diagnosed and repaired as soon as possible to avoid further damage and ensure safe operation.
