bouncing idle ?!

[jondee86]

Most common cause is a faulty idle up air bypass valve (auxiliary air
valve) located under the throttle body. You can check by removing the
air intake ducting, and putting your finger over the air port inside the
throttle body. This is a round hole about 7-8 mm dia at the bottom and
in front of the throttle butterfly.

If the engine revs drop and stabilise when you block this port, it will be
the AAV that is causing the problem. Check that you don't have air in
the water circuit to the throttle body (pull off the hoses while the engine
is running and bleed out any air bubbles).

If that doesn't work, try taking the AAV off and cleaning it. If you still
have the problem, buy a new AAV from Toyota

Cheers... jondee86