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.
"409" by the Beach Boys.
No revving your engine dosent damage it.
Increasing the rpm (revolutions per minute) would be revving the engine.
Becuase you're revving the engine. Becuase you're revving the engine.
Excessive revving of an engine causes overpressure in the crankcase. It causes unhealthy expansion in the pistons and the valves.
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.
The most common cause of engine revving is a dirty or clogged air filter.
The man kept revving the car's engine as though he was a teenage boy showing off.
Usually a squealing sound upon acceleration , or even just revving the engine in neutral , indicates a worn or loose fan belt .
It keeps the engine from over revving.
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.
The most comon cause of an engine that keeps revving up and down (aka surging) is a dirty air filter.