Misfires can also cause engine damage over time. When you have misfires, the fuel in the chamber is not burning properly. This means fuel enters the catalytic converter and increases its heat, potentially causing damage. It can also damage the pistons and cylinders or cause warping in the valves and pistons.

Can a misfire ruin an engine?

An engine misfire can be caused by bad spark plugs or imbalanced air/fuel mixture. Driving with a misfire isn't safe and can damage your engine.

What are the effects of a misfire?

When a misfire happens, your engine might momentarily stumble, and it may even lose speed (RPMs). However, most misfires dissipate, and your engine regains its normal speed after a second or two.