What causes the exhaust to pop when you decelerate?

What causes the exhaust to pop when you decelerate?

When you decelerate, you reduce the amount of throttle. This causes an overrun, that is, the motor’s rpm is turning faster than the fuel provided can support, so the motor begins to spool down. This causes a couple of things to happen.

What should I do if my exhaust is popping?

Remove the baffles and you increase airflow through the engine, and you have a lean condition. Once you re-jet, (assuming we’re right) and things are running right, do what he suggested and check your plugs AGAIN. You may need to change the plugs to another heat range.

What causes a backfiring exhaust on a 350 cubic engine?

Thankfully, because both of these components are on top of Chevrolet’s 350 small-block engine, checking them is quite easy. Backfiring is typically caused by an air/fuel mixture that is too lean, meaning the mixture has too much oxygen in it. First, check that the mixture screw (s) on the carburetor are adjusted properly.

Why does my engine pop when I let off throttle?

Idle is 1500rpm. I never have popping or backfire during idle, cruising speeds or under accelleration. Only time I’m getting it is if I open up throttle to speed up rapidly, then let off throttle. Is this damaging to my engine? It’s like a rapid succession of pops/bangs… like 3 to 5 of them.. Or is this its normal sound?

Remove the baffles and you increase airflow through the engine, and you have a lean condition. Once you re-jet, (assuming we’re right) and things are running right, do what he suggested and check your plugs AGAIN. You may need to change the plugs to another heat range.

What causes the exhaust to pop on a motorcycle?

So many things it could be, a lot depends on what model motorcycle. Too lean, as mentioned, is generally the cause. A vacuum leak is not uncommon. Plugged slow jets not uncommon (and that can cause other major problems. If the bike never did it, sat a long time and started popping, that’s more of a possibility).

Why does my engine pop when I rap the throttle?

Not enough air to finish the job to a reasonable level. The popping is usually from over lean because thats when you have oxygen in the exhaust and it can wait until the AFR is burnable in the exhaust and then you get a little pop. If you get onto an over lean cammed engine and rap the throttle it will blow black smoke.

Thankfully, because both of these components are on top of Chevrolet’s 350 small-block engine, checking them is quite easy. Backfiring is typically caused by an air/fuel mixture that is too lean, meaning the mixture has too much oxygen in it. First, check that the mixture screw (s) on the carburetor are adjusted properly.