Pressing on the accelerator or (revving) the engine will not harm it unless :
1- you over-rev it (keep pressing for a long time)
2- your car is very old and isn't that reliable
3- there is some dirt in the cars oil which will eventually harm it
4- the car's injectors are not clean or not operating in good way, this may lead to that one of the cylinders of the engine may stop working or maybenot operate properly
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.
I assume you mean add fuel by pressing the accelerator. In which case the engine runs faster.
Driving a manual car involves several fundamental steps. Firstly, ensure the car is in neutral by pressing the clutch pedal and shifting the gear stick to the middle position. Start the engine and gradually press the clutch while shifting the gear stick into first gear. Slowly release the clutch while gently pressing the accelerator to start moving. To change gears, lift off the accelerator, press the clutch, shift to the desired gear, and then release the clutch while gradually applying the accelerator again. Rem
There are several possibilities: a clogged fuel line or fuel filter, a malfunctioning fuel pump, or a problem with the clutch and/or transmission that prevents a higher engine speed from causing increased wheel speed.
Raise the hood and have a helper start the car while you listen. Check around the top of the engine to find the humming.
Put the transmission selector into neutral and pull over to the right side of the road when it's safe to do so. Don't shut the engine off until you have come to a complete stop. Turn on 4 way flashers.
The idle speed needs adjusted upward if an engine stalls when you take your foot off the accelerator while stopping or turning.
With the engine running place the transmission in the neutral ( N ) position. Gently press the accelerator ( gas ) pedal to increase RPM. If the squeal is heard it is most likely a belt or pulley on the engine. If it only occurs while driving then it is most likely a wheel bearing.
Open your hood and have someone press and release the accelerator pedal while you look for movement at the end of one of the cables on the top of the engine. That is the throttle.
So you can't max it out and blow up the engine.
The engine has a rev limiter while the transmission is in neutral. It will rev to higher rpm's when the transmission is in gear.
When you press the accelerator, the engine wants to tach up right then and there... in the current gear the car is traveling in, it may not be possible without bogging the engine down, so the transmission is shifted down in order to accommodate the demand for increased RPMs while preventing the engine from bogging.