High Idle After Throttle Body Cleaning!

[BlexusGS]

The car runs great however even AFTER 5 minutes of warm up and 15 minutes of driving the idle in park is still at 1200RPM! Please help. I just cleaned the TB last night. I have a GS400. Thanks.

[stroked4.6]

The car runs great however even AFTER 5 minutes of warm up and 15 minutes of driving the idle in park is still at 1200RPM! Please help. I just cleaned the TB last night. I have a GS400. Thanks.

I would double check you vacuum hoses.

[MattL]

BlexusGS, what was the issue?

I have a 01 GS300 with 200k miles. I changed the plugs and cleaned the throttle body this weekend. The throttle body had very heavy deposits and plugs were shot. Idle was at 1500 rpm when I restarted it. I pulled the TB back off to verify the gasket was seated properly, and checked the vacuum line. All appears well. I'm thinking it might be a sensor problem??

Any help would be appreciated.

Thanks

Matt