Although modern engine control systems alleviate most of it, there are things you can do to prevent your car from backfiring.
- Change oxygen sensors.
- Stop air leaks.
- Renew that spark.
- Check engine belts.
- Keep a healthy exhaust.
What causes an engine to backfire through the exhaust?
“Backfiring” is usually caused by a spark plug “sparking” when it isn’t its turn and the exhaust valve is open. Backfiring through the carb (spitting or coughing) usually occurs in the morning when a carb’s air/fuel mixture is a bit too lean. This usually goes away once the engine warms-up.
Is backfire bad?
backfires are very harmful. there are many sensors and more delicate parts in the intake, and what goes into making a backfire is a lot more harmful. if you run too rich it eats up your cats–afterfire or no.
What causes a car to backfire and not start?
Engine backfires can be produced by a vacuum leak, bad timing, problems in the ignition system, a faulty sensor, an exhaust leak, or some other system fault. The backfire is produced when unburned fuel ignites inside the intake or exhaust manifold instead of a cylinder.
Photo in the article by “Mount Pleasant Granary”