Accelerate up to 3000 rpm then release the acceleration pedal, the rpm meter go down to 1200 rpm, and then automatic spike to 1800 rpm and the car jerks without pressing the acceleration pedal! Is it normal ? New TOYOTA CAMRY 2.4 bought in year 2010

Do you have a check engine light?

Failed Transaxle

How can you not know that ??

it sounds like a problem with your computer and will need to be hooked up to a computer with diagnostics info for wrx

You will need to have the fuel pressure monitored under a load with a special tool and also drive it for a while and see if the check engine light comes on, if it does have the system scanned and diagnose the codes received.

You have a slipping transmission, if the fluid is full then you will need to have the ****** removed and rebuilt.

now is the car 2017 plated or 2011 plated
as there is a vast difference between new and second hand new to you
Next question is it automatic transmission or CV transmission
With automatic as you increase rpm the car will accelerate and you will feel ratio changes up to the point where road speed = engine rpm for that throttle setting
With a CV transmission ( constant velocity transmission ) there is a torque converter but that is where the automatic action ends
In the transmission there are 2 pulleys with a big belt that can vary the ratios by pulling the flanges together on one and expanding on the other
This gives an infinite number of ratios and is designed to keep the best ratio selection for the torque band of the engine
SO how does it affect your driving
If you floor the pedal on take off, the engine will red line and stay there until road speed builds up
OR you ease back on the pedal and the pulleys start to change the ratios to suit the power band
How to drive it
when you want to take of push the pedal down to around 2500 rpm the car will take of normally
as the road speed increases , ease off the pedal and it will keep altering ratios until the correct road speed is reached for the rpm on the dial
The only catch that you will have to get used to is when going to pass at speed , you tend to floor the pedal to get past quickly but it will not down change ratios until you ease of the pedal and then the car will speed up to the rpm that you are holding it at
IT is different in driving and you will have to learn to drive to rpm not road speed and then it will behave normally ( set the rpm by the pedal and the transmission will catch up and to make it catch up , ease of the pedal in stages , just like a conventional automatic

Any tune up issue could be bad catalytic

This may apply. ...............................

Carry out the adaptation drive cycle road test:

Note: This process must be carried out in normal mode (not sports mode). On a flat road, the transmission fluid temperature must be above 60° C (140° f) and below 100° C (212° f) (vehicle at normal operating temperature will ensure that the transmission fluid temperature is above 60° C (140° f)).
9. Accelerate from rest with light throttle (do not exceed the upper rev limit in appendix 1). 1-2, 2-3, 3-4 shifts must occur with engine speed between the following limits:.
Note: Do not move the accelerator pedal during shifts.

• 3.0L VIN ALL 1800 - 2000 rpm
• 4.2L N/A Prior VIN M96321 1450 - 1600 rpm
• 4.2L N/A From VIN M963221550 - 1700 rpm

10. Continue to accelerate gently to 50 mph (80 km/h) so that transmission shifts into 5th gear.
11. Go into overrun and let the transmission shift down into 4th gear without braking.
12. Brake gently to a standstill and hold footbrake on for at least 15 seconds.
13. This process should be carried out at least five times.

Page 2 of 3 Bulletin Number S307-17
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check throttle position sensor wire chewed up, broken wire or unplugged? check with volt meter mesure the voltage @ throttle positon sensor see if there's voltage goes up/down when u apply/release gas.

have you had the vehicle speed control reprogrammed if not that could be your problem