TB MAP sensor? simi lai eh? mine also vibrate at traffic lights.
throttle body manifold absolute pressure sensor.. usually near firewall area with a vacuum line running to Throttle body injection.
i am not too sure which is the issue too, but for my case my previous car also had similar problems so i traced a few possible causes in the end is the Idle Air Control Valve that went kaput. Primary use to permit additional air to enter the TBI on cold start up, A/C compressor engagement, and for some cars i think high power steering loads. This effectively increases the idle speed and prevents the engine from stalling..
best is to clean up all the damn sensors that have relation to TBI