your lifters may be lose and need tightening
To change the sound, For instance an overdrive pedal boosts the sound making it louder and clearer, where as a distortion pedal makes it louder but less clear.
Usually it sounds like a clunk. Put the car in drive, step on the brake pedal and hold it down while you slowly accelerate on the gas pedal. If the engine lifts to one side, your mount is broken.
With the engine running , and the vehicle stopped with your foot on the brake pedal shift the transmission to NEUTRAL and then rotate your selector switch to 4X4 low then put in drive / reverse ( to switch back from 4X4 low to 2 wheel drive , with the engine running , and the vehicle stopped with your foot on the brake pedal , shift to NEUTRAL and then rotate your selector switch to 2 wheel drive then put in drive / reverse )
just underneath the dashboard above the gas pedal
Gasoline pedal/air intake pedal
underneath the brake pedal
the pedal is still the same in foreign vehicles
The gas pedal.
I had a 94 buick regal that did tis. It was a 250 dollar repair job. It was the piece that spins the power accessory belt on the engine. I think its called a harmonic balancer
In the brake fluid reservoir, if you can't find it, look in your book, or follow the fluid lines from underneath your car to the reservoir. A further clue is that the brake pedal arm and brake pedal, the one that you put your foot on to operate the brakes, is connected directly to the brake fluid reseviour, so look at the firewall amd see where the pedal arm comes into the engine compartment, thru the firewall.
it is attached to the transmission and allows the engine to be started when the gear lever is in 'park' or 'neutral', but prevents the engine from being started in 'reverse' or 'drive'. on some cars the driver must also put their foot on the brake pedal before the engine can be started.
look right above your brake pedal underneath the steering column.