Car Idles At 2500rpm Until I Stop

[spadepro22]

When I drive the car it drives normal, but when I put it in neutral the rpms hold around 2500 until I come to a complete stop. What could causing this to happen?

 

[rb26alpha]

maybe something to do with the balance shaft removal?? dont know. pvc tube clogged

 

[pauleyman]

If you've moving you're not idle. ECU knows when you're moving. There are inputs for the speed sensor and power steering. If you're idle, THEN you're can say you're idling. You make any quick inputs at speed, demand brakes etc which required vacuum you don't want to be at "idle" rpm. ECU is programmed for this.

 

[johnmel]

Terry's Talon Troubleshooting Tips #3 - Fast Idle (aka. Idle Surge)