Westchester Auto Repair

The engine stumbles halfway up a hill, then runs normally for the rest of the trip. At the next stoplight, you study the dashboard, expecting a check engine light. Nothing stays on. A few days later, the same hesitation happens again. That makes it difficult to know whether to book a repair or wait for something more definite. The light and the sensation don't always arrive together. A short-lived misfire still deserves attention, particularly when it happens under the same driving conditions each time. 1. A Weak Spark Only Breaks Down Under Load A worn spark plug or weakened ignition coil can fire at idle yet struggle when you accelerate. Higher cylinder pressure makes the spark harder to produce. The engine might stumble during a hill climb, recover when you ease off the pedal, and never run badly long enough to leave a constant warning. A technician can watch cylinder misfire counts during a controlled road test, then examine the suspect plug, coil boot, and ... read more