So on 3 different occasions now I have come to a stop light or stop sign and have had the rpms go up to 1000-1500RPM. First instinct was to drop it into neutral, it still stayed at a little over 1000RPM. Not 100% sure but it seems to happen when the car is in tip-tronic and just left in gear without any manual shifting. I put it back in to drive and after a minute or two of driving seemed to disapear. The car was still cold and warming up, about 3 Degrees Celcius this morning however the car was in the garage and has been parked for the past 3 days. I also recently changed the OEM air filter to a K&N drop in oiled filter which will be getting changed shortly with an F Sport intake. No CEL lights. Hopefully that covers all the information. If anyone can help me out here with some possibilities it would be appreciated.

Thanks.

 

It's probably because the car is still cold. Has it ever done it when it's warm? Tomorrow, let the car run for 5 minutes before you leave, and see if it does it. If it still does this when it is warmed up, you've got a problem.

 

Good point..... I'll defenately see if that works.

 

Mine does that too when outside temp gets low. Goes away when warmed up. Just hold the brakes harder

 

Good to hear, and yes the brakes are jammed down good!

 

Tried again. Warm engine no issue, cold or semi cold and the idle stays high or will increase to about 1500rpm at stop lights or when slowing down.

 

Just a normal part of the warm-up process... the engine is trying to get up to temp as soon as possible for emissions purposes.

 

Thanks, had me worried.

 

some car models wont hit top gear until it reaches an appropriate temperature as well. I'm not sure about the IS though.

 

The IS does this too.