THE REVS ARE TOO HIGH WHEN COLD AND DONOT DECREASE WHEN I TAKE MY FOOT OFF THE ACCELERATOR TO CHANGE GEAR, WHEN THE CAR HAS HEATED UP ITS FINE JUST WHEN COLD.....PLEASE HELP ITS A 2003 AVENIS AURA( OLD MODEL)
High RPM is by purpose. Reason is to get engine hot as quickly as possible to reduce emissions. There is nothing to worry about. I am sure if engine is warm/hot then you wont see high RPM even if you resart it.
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do they revs drop off when taking pressure off accelerator pedal when out of gear? if only staying high during gear change it would suggest a worn clutch friction/pressure plate so the engine isn't slowing down when clutch is depressed .I'd also have the OBD codes read to see if there is a sensor/switch at fault , but sounds like the clutch to me
I would consider changing the vehicle speed sensor. When they go bad, they can really throw out a lot of bad data to the computer, resulting in unexpected behavior like you're experiencing. They're only around $20-$25. I hope this helps! :)
1. Transmission fluid level
2. Engine idling rpm
3. Accelerator pedal position (APP) sensor
4. Line pressure test AT-66, "Line Pressure Test"
5. Line pressure solenoid valve
6. Control valve assembly
7. Transmission control cable, if any.
8. Short circuit in wiring harness.
when vw started to use the computer controlled gearbox system a criticism was the shift was very harsh,to counter this they made it rev slightly before changing.so that you know the system, try this out....without touching the gas.....put it in d and let the car accelerate to its max speed,stop,then use 1/3rd of gas (keep your foot still)and let it do the same...stop,then,if safe,put your foot to the floor,hard, notice when the car changes gear(revs/speed)then if you drive,only using the first1/3rd of the gas,the cars change pattern will alter to suit.......wierd it is.....
the engine tickover is too slow when the engine is cold its running on cold start, ie:choke,, after it warms up the engine slows down this is what is causing it to stall in gear,, get some one to hold the brakes hard on and with the engine running in gear ajust the tick over till its reving at 750 - 850 rpm the revs will go up a bit when its out of gear,, before you pick a gear to go into push the foot brake down to stop the car lurching,,,