Here since it has become colder when I start my car it tends to rev up to about 1700-2000 rpm then drop to around 900 or so constantly. Its rather annoying.Once the car warms up it stops though. Has anyone else experienced this problem? I was thinking it may be the TPS causing it because the motor is revving that high but its not seeing that the throttle is being moved causing it to drop back down but if anyone has any info please let me know. Thanks.