It could be a few things. Maybe a fuel knock caused by timing or something like your rocker arms are out of adjustment. Also you could have bad crank or piston rod bearings or cam bearings.
A tapping noise might come into the engine because of heat damage to the lifters of the motor. You might also hear a tapping sound if the engine has been damaged due to a blown head gasket.
Low coolant and air in the heater core.
It is quiet obvious when you have a turbo because when you accelerate you hear a whistling sound. The turbo noise is unmistakable.
A tapping noise is generally the result of a bad hydraulic lifter, plugged oil passage to the lifter, or bad tappets. Sometimes just changing to lower viscosity high detergent oil will cure it. Or "Any automotive oil additive with the word MIRACLE in it".
The systolic pressure is measured at the first Karotkoff sound (stage I), it is the first tapping noise that you hear with a stethoscope when taking a manual blood pressure.
It sounds like you are describing a condition known as pinging. That is the result, normally, of having the ignition timing too far advanced.
"Did you hear that noise?" -or- "Did you not hear that noise I just heard?"
When you listen to a pencil tapping, the sound you hear is vibrations being transmitted through the air. As the pencil taps, it creates a disturbance in the air molecules, which in turn creates sound waves that travel through the air to your ears, allowing you to hear the tapping noise.
The house pest often associated with a tapping sound is the carpenter ant. These ants create noise by chewing through wood, which can result in a rhythmic tapping as they establish or expand their nests. The tapping sound is typically more noticeable at night when the surrounding environment is quieter. If you hear this sound, it's a good idea to inspect for signs of an infestation.
You are hearing a whirring when accelerating first to fourth because you are accelerating too fast and the whirring noise results. If you accelerate normally then you won't hear the whirring sound.
chances are good in your 1996 Chevy lumina if there is a slight tapping noise, check the oil. it may be low, or you may need to add a thicker additive. good luck!
Past: Heard (e.g. I heard a noise) Present: Hear/hears (e.g. I hear a noise, She hears a noise) Future: Will hear (e.g. I will hear a noise)