Posts Tagged: Spark plug condition

Why worn spark plugs cause no-start problems in cold weather

How worn spark plugs affect cold weather starting Here’s the simple version: Worn spark plugs that start your engine in 70°F weather can cause a no-start in cold weather. Here’s the technical scoop on why that happens. Spark ignition is a three-part process; ionization, plasma creation, and flame creation On a modern engine, the ignition coil develops 40,000 volts and sends it to the spark plug where it’s supposed to jump the gap between the center and side electrodes. Forcing voltage to jump a gap is hard enough in air, … Read More