Reasons Engine Could Backfire - Chevrolet Engine Service Information in Salem, OR
Get answers about engine backfire at Capitol Chevrolet

Nowadays engine technology is advanced, and the likelihood that you've heard an engine backfire in real life is unlikely. As unusual as it is, backfires still happen. The sound varies from a sputter to a cough, or even a gunshot, and can be quite startling. There are several reasons that your engine could backfire. The best way to address this is to schedule an appointment at an authorized Chevy dealership to diagnose the issue.

Schedule service for engine backfire at Capitol Chevrolet in Salem, OR

4. YOUR VEHICLE HAS OLDER TECH

While backfires aren't as common in modern vehicles, vintage Chevy models can still experience one. The old mechanical components in these vintage engines require regular tune ups, unlike the newer computer systems used today. If tune-ups are neglected in these older models an engine backfire could happen. An engine backfire could be caused from improperly placed spark plug wires, but the most common reason is the carburetor. A poor mixture of fuel and air could cause a backfire, and tuning a carburetor is not an easy task to undertake. If your vehicle is from the late 1980s and newer, there is a strong likelihood you can rule out carburetor problems.

Learn more about engine backfiring and what it means for your Chevrolet

3. THE TIMING IS OFF

Just like an engine backfiring, having bad engine timing in a modern engine is extremely unusual. While carburetors aren't found in modern engines, any engine no matter the age can still have bad timing. Bad timing in an engine can cause trouble, just like it can ruin the punchline of an otherwise good joke. When timing is off, even just a tiny bit, one of two things might happen: the spark plug will fail to burn all the air and fuel mixture, or that mixture might ignite where the valves remain open. Both of these could cause a backfire.

2. THE FUEL RATIO IS TOO RICH

Your vehicle's engine uses a specific ratio of fuel to air in regards to the internal combustion engine. Too much fuel and not enough air causes a ratio that's too rich. This can cause some of the mixture to combust in the exhaust instead of inside the combustion chamber. The mass airflow sensor, fuel injectors, and engine air filter are all components that your mechanic will check if your fuel ratio is too rich.

1. THE FUEL RATIO IS TOO LEAN

On the flipside from an air-fuel ratio that is too rich is one that's lean, meaning there's too much air and not enough fuel. This ratio dilemma can cause problems all its own. When the spark doesn't ignite all the fuel at the same time, vapor may escape the exhaust and cause combustion. Clogged fuel injectors, a bad fuel pump, or a vacuum leak are all potential cases of a lean ratio.

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CAPITOL CHEVROLET OF SALEM

2855 Maple Ave Ne
Directions 2855 Maple Ave Ne
Salem, OR 97301

  • Contact: (503) 877-2943

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