Why Does My Volvo Engine Misfire?

Over the years, Volvo has invested heavily in streamlining the performance of their engines through innovation. It therefore does not come as a surprise that Volvo is one of the world’s most respected brands. With cars that guarantee value for money, speed, class and comfort, Volvo is by all means a brand you can trust. But like any mechanic will tell you, Volvo engines sometimes misfire not because they are poorly designed but because of poor maintenance. Read on to learn more about misfiring engines, what causes them and what you can do to ensure the problem does not resurface after fixing it.

Imbalance in Air-Fuel Ratio

When air and fuel are not mixed in the right ratio in the combustion chamber, the engine will misfire.  Ideally, for successful combustion to occur, the volume of fuel should be more than that of air. Therefore, when more air than fuel is sucked into the combustion chamber, the engine misfires. This is only notable when the car is idling as when at high speeds, the misfire goes away. The imbalance in the ratio is mostly due to clogged fuel filters, a faulty fuel pump or a faulty air-flow sensor.

Issues in the Ignition System

Faults in the ignition system can also cause misfires in your Volvo. For instance, if the spark plugs fail to create enough spark to ignite the combustion chamber, the engine will misfire. Additionally, worn out ignition cables, ignition coil, or even rotor can lead to misfires. It is worth noting that the misfires due to issues in your Volvo’s ignition system may not be easily noticeable. However, as you drive, you likely to feel the engine jerking especially when accelerating.

Mechanical Problems

Your Volvo engine comprises of different mechanical parts that collectively contribute to the functioning and performance of the engine.  From camshaft lobes to piston rings, cylinder walls and valves, these are parts that wear out with time. When they wear out, the engine’s pristine performance is interfered with and hence it misfires.  The timely replacement of the worn out parts will save the engine from requiring an overhaul.

Vacuum Leaks

Vacuum leaks in the engine also cause misfires in the engine.  The best way to diagnose if the car has a vacuum leak is by listening for high-pitched hiss sounds when the engine is running. However, even if you confirm there are leaks in the engine, pinpointing the source of leak will require professional help. These leaks should be sealed as soon as they are noticed before they become serious problems and require extensive repairs.

Should I Drive When the Engine is Misfiring?

The short answer is no. Engine misfires are generally not major issues. As such, driving with these misfires is not necessarily dangerous.  However, you should not ignore the problem for too long.  Continuous engine misfires can damage parts such as oxygen sensors and catalytic converters. In addition to this, engine misfires can also lead to power loss especially after driving for long without stopping. The best way to address engine misfires is through regular servicing. This extends the lifespan of the engine while at the same time ensuring that you enjoy Volvo’s driving experience.