i'm not familiar with acuras. Is the maintenance and check engine lights the same ? I remember last summer when i had this problem. i had a few sensors out. i had to replace the TPS and the IAC valve plus the O2 sensor down the exhaust. if the ecu is not receiving the signals it should then the car will enter in a "Safe Mode" and will cut your rpms around 5500-6000 (on mine). Also there is a idle adjuster screw on the TB which will allow you for idle adjustements.
I'm not the turbo guy but for a stock engine this should be a fix.Hope this helps a bit.
~Stefan
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