When your vehicles spark plugs go bad your vehicle can be hard to start, misfire, hesitate or lose power upon acceleration and spit and sputter when taking off from a stop light.
You should change spark plugs every 100,000 miles or sooner if you notice engine problems.
Bad spark plugs can also cause your vehicle to use more fuel than normal too since bad spark plugs can prevent the engine from igniting the fuel correctly.
Change the spark plug wires whenever you change the spark plugs too for optimal performance since bad spark plug wires can cause engine misfires and loss of engine power too.