maybe your rpms gauge is broken.
get it looked at by a professional
major vacuum leak?
because the engine needs to have a 20 seconds RPMs
Problem with the choke or cold start injector system.
On the moon things weight 16.6 % of what they weigh in earth. So a 3000 lb. car would weigh 498 lbs.
It depends on what type of car and what gear you are in
the sensors get the sensors looked at because sensors are notorious for failling and causing problems
It is the crank positioning sensor.
If it's cold outside, it's because ECU use ambient temperature sensor and coolant sensor to manage RPMs. After you start the car the coolant temperature is low and ECU sets RPMs very high, when it gets warm RPMs drop down until engine reaches operating temperature.
Its cause you are low on Freon. You need to put some in but when you put it in your car needs to be reved to about 3000 rpms. The reason it doesn't work is because when your idleing you are in low rpms and there isn't alot of pressure in the compressor. But when you do move it kicks on. You will need someone to help you do it but its an easy process.
the cars belt will start to brack and the car will stop
Both can cause it.
get to 3000 RPMs in 2nd or 3rd gear and then step on the gas hard(safely!) , If the revs go up quickly and yet he car doesn't pull hard , the clutch is slipping.