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One reason could be after-fire. It's a form of backfiring caused by the engine running too rich. There's excess fuel in the exhaust gasses which ignite in the exhaust. I think it's because the fuel mixture is lagging behind the revs as they lower. As a richer mixture is required at higher RPM's and that mix will be injected into the engine when you rev it, but as you let the throttle out it won't adjust immediately causing this excess of fuel at lower RPM's and some of it won't be burnt in the cylinder, causing the backfire.
What else can I help you with?
What song begins with the sound of a car engine revving?
The song that begins with the sound of a car engine revving is "Life is a Highway" by Tom Cochrane. The revving sound sets the tone for the energetic and adventurous theme of the song, which is featured in the movie "Cars." The revving engine serves as a symbol of motion and freedom, reflecting the lyrics about the journey of life.
Does revving your engine damage it?
No revving your engine dosent damage it.
What is revving of engines?
Increasing the rpm (revolutions per minute) would be revving the engine.
Why would a 1986 Toyota corolla 4ac engine tacho bounc up and down?
Becuase you're revving the engine. Becuase you're revving the engine.
What effect does excessive revving have on your car engine?
Excessive revving of an engine causes overpressure in the crankcase. It causes unhealthy expansion in the pistons and the valves.
No acceleration while pressing down on accelerator?
If the engine is revving up, then the transmission is having problems. If the engine is not revving, then check the linkage from the accelerator to the throttle body.
Why is your lawn mower over revving?
The most common cause of engine revving is a dirty or clogged air filter.
How do you make a sentence with revving?
The man kept revving the car's engine as though he was a teenage boy showing off.
Your 2004 Chevy astro van has a high squealing sound when you accelerate?
Usually a squealing sound upon acceleration , or even just revving the engine in neutral , indicates a worn or loose fan belt .
What is the function of mechanical governor?
It keeps the engine from over revving.
When you accelerate the engine revs past your shift points?
Revving your engine past its shift points is never a good idea. Unless you are on a track day, revving your engine past its limits not only means consuming more gas, but your car starts revving heavily and if you continue to do so, you will damage your transfer case.
What are 5 examples of sound energy?
A ringing doorbell A musical instrument being played Thunder during a storm A car engine revving A person speaking or singing
