Throttle body is the part that the accelerator cable is attached to. The barrel has a plate that closes fully when engine is idling but it would still allow a minimal amount of air past it. When the barrel gets dirty, this minimal amount of air is reduced and this would result in lower than expected idling.
It need not be removed for cleaning as carb cleaner works fine but if it can be removed, that would be ideal.
The IAC motor is mounted on top of the throttle body. It allows air to pass through and amount varies according to engine temperature and is computer controlled. Carb cleaner into the air passage would help to clean it. You must not submerge the throttle body and IAC while cleaning as it can damage the TPS and IAC motor.
What were the trouble codes you have and after replacement of the components concerned, are they still there?
What ever information that you have, you should provide it for me so that I can understand the problem better.
The carb cleaner can also be used to test for vacuum leakages
Images (Click to enlarge)
Sunday, June 17th, 2012 AT 4:29 PM