Spark Plugs Service Video

Spark plugs create the spark that ignites the air-fuel mixture inside each cylinder. That spark starts combustion, which pushes the piston down and keeps the engine running.

Worn spark plugs can cause hard starting, rough idle, engine misfires, poor acceleration, lower fuel efficiency, and a check engine light. As the electrodes wear, the spark plug gap grows wider, and the ignition system has to work harder. Each plug must fire thousands of times during normal driving. If the spark becomes weak, fuel may not burn cleanly, leaving the engine shaky or sluggish.

Hot, muggy Alvin summers add stress because high under-hood heat can make ignition problems show up faster. Heavy rain and moisture can also expose weak ignition coils, plug wires, or connectors, especially after coastal downpours.

These issues matter for sedans, crossover SUVs, and pickup trucks used for high-mileage trips across Brazoria County. Stop-and-go traffic on Highway 35, State Highway 6, and FM 517 can make a misfire feel worse during takeoff.

Genesis Auto Repair checks the plugs, ignition system, trouble codes, and fuel trim data before recommending replacement. Drivers from Pearland, Manvel, and Friendswood can learn more through our tune-up service.

For nearby help, visit a mechanic in Alvin that understands local driving, heat, rain, and commuter wear. Call Genesis Auto Repair at (281) 968-7411 today; we can help diagnose rough running before it becomes a bigger engine problem.