High engine rev low

All the things you mention at the end would cause codes on a scan tool so it is unlikely to be those.

A high end $5 grand scan tool computer should diagnose the acceleration issue, but they can't diagnose bearing or gears that are worn.

You could try cleaning the Throttle Body and MAF.

no, the engine will run at higher rpm's than normal and can cause damage. if trying to get it home...drive much slower than normal and have flashers on.

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/stephen_171aeeebef53a898

It only revs up when u start the first in the morning? If so, it is normal, once it warm up it will back below 1000 rpm.

needs a tune up, plugs wires air/fuel filter will cure this problem

George,
1) Yes It is normal for corona Engines to have that high rev when the engine is still cold. It automatically adjusts to the Normal Rev/min when the engine gets warm so don't worry about that.
2) The Buttons are use when you are running on road. PWR means Power meaning that you lock the car in gear Five while sprinting. MNL stands for manual transmission.
3) Econ tries to show you that you are using a higher gear like say 5, therefore your fuel consumption is now being economized and thus low consumption. Actually, its always good if you drive your car with that light on coz it saves on your fuel. It get on automatically.

Don't forget to vote my solution if it was of help to you.

If this is a manual, sounds like the clutch is worn and needs to be replaced. If this is an automatic it could be the torque convertor or various parts int he transmission showing wear.

get car tuned up may need spark plug lead(may not be running properly on 4 cyls)may cost $80-$200 depends on parts needed

these vehicles are equipped with a rev limiter..normal operating condition

yes it is normal many customers complain about how the newer cars are not as responsive from a stop basically you have to hit the gas then the car goes seems to rev high to people with not a lot of movement becausse of this its because the newer cars are throttle by wire when you hit the gas it sends a electrical signal to the throttle to go instead of a few yyears back they were you hit the gas and the cable attached to gas pedal pulls back throtttle much more responsive hope this helps

it can also be an oxygen sensor for your fuel, i had the same issue with my malibu at one time.