Eugene Auto Repair

Spark plugs wear a little every time they fire. For a long while, the engine compensates well enough that you barely notice. Eventually, worn electrodes or contamination make ignition less reliable, and the first clue is often a rough start or hesitation under load. Fuel use sometimes changes too. The effect depends on how the engine is running and what has failed, so replacing plugs should follow the service schedule or test results. At Small World Auto Repair, we check the ignition system alongside the symptoms. That keeps a plug replacement connected to the engine's actual condition. How Spark Plugs Wear During Normal Driving A gasoline engine needs a spark at the right moment to ignite the air-fuel mixture. The spark jumps a small gap between electrodes, and heat, electrical activity, and combustion gradually change those surfaces. As the working edges wear, the ignition system has a harder job creating a reliable spark under demanding cond ... read more