Have you tried closing the idle screw a bit? When (if) you do get it to idle below 1K rpm, what's the ECU's IAC setting. Also, some IACs (Mazda used two different sources) have a fail-safe mode that puts them in high-idle mode if the IAC drive signal fails so you might try simply unplugging the IAC electrical connector and see if it behaves any differently. ----- Original Message ----- .....The problem got worse after I cleaned the throttle body and air filter ...
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