Cylinder misfires can turn a smooth commute into a rough, fuel‑wasting slog, and they almost always leave a trail of diagnostic clues if you know where to look. I focus on four of the most common ...

A 2000 Chevy Blazer with a 4.3 engine and about 165,000 miles on it came into the shop, and the owner was complaining of a check engine light, poor fuel mileage, and a code P0300. P0300 is a random ...