Textual description of firstImageUrl

Car Engine Backfire When Decelerating

Car Trouble Symptoms:

During deceleration or while the car is slowing down the engine backfires.

Car Problem Diagnosis:
The car that backfires during deceleration is an indication that there is a possible problem with the emission control device or commonly known as the air injection system. Usually, the problem of the air injection system is the result of a failing diverter. The function of the air injection system is to pumps fresh air into the exhaust manifold so that any unburned gasses will completely be burned before it gets out of the exhaust the tailpipe.

During deceleration the engine air/fuel mixture is rich that is why lots of unburned gasses go out the exhaust manifold. If all of these unburned gasses are exposed to fresh air a mini-explosion will happen. Now, the diverter valve is the one that diverts the fresh air away from the exhaust manifold when the car decelerates, now if the diverter valve is failing the engine will backfire.

Possible Cause of Engine Backfire When Decelerating
Problem with the air injection system
The Truth About Cars 

What to do?
Bring your car to a reputable auto repair shop then ask the mechanic to inspect the air injection system to confirm the problem on the diverter valve. This is just a possible cause of the problem. There might be other causes of which can only be determined by actual inspection of the car. However, before proceeding with the repair check first with another mechanic, a second opinion is better before deciding in any repair works

No comments:

Leave a Comment

Share with us what you think about this topic to help others know more information that this article did not cover.