It depends how high you're talking about. If you mean revving all the way to the red line then yes this is bad for the engine. But the rpm shouldn't exceed 4000 rpm. If it is slightly below this then it is fine.
Yes it can. It will add throttle to match what speed it was set too.
Using a lower gear while driving on steep inclines provides better control over the vehicle, increases engine power, and reduces strain on the brakes. This can help prevent the vehicle from rolling back and improve overall safety while driving uphill.
They say that over 100Km / hour your car will consume 20% more gasoline than usual. Also, try to not use your cruise control in uphill road because no matter how hard it is for the engine, the gas flow will be extreme !
When driving uphill, gravity acts against your motion, decreasing your kinetic energy. When driving downhill, gravity acts in the direction of motion, increasing your kinetic energy.
Gravity remains constant regardless of the direction you are driving in. However, the gravitational force may feel stronger when driving uphill due to the incline causing a greater component of gravity to act against the vehicle's motion.
Gravity.
Engine is in need of tuning.
its getting ready to explode. jump out quick
Driving in low gears. Pushing hard on the accelerator ("flooring it"). Going uphill. Driving with excessive weight (like a trailer). Either shift up or lay off the gas to bring your engine speed down. This is a classic symptom of a "worn clutch" in a manual transmission vehicles. The friction disc cannot transfer power under load so it slips under load causing excessive engine reving. Excessive engine RPM at idle can be caused by a vacuum leak or by a stuck Idle Air Control (IAC) valve.
Time for a tune up.
Yes, when traveling uphill, it is generally recommended to use lower gears to maintain power and torque to overcome the pull of gravity. This will prevent the engine from straining and provide better control of the vehicle.
With a forklift, carry the load on the uphill side.