Minimum Air Rate - Fuel Injection Only

NOTE:
- This adjustment should be performed only when the throttle body assembly has been replaced. Engine should be at normal operating temperature before making adjustment.
- The throttle stop screw, used for regulating minimum idle speed, is adjusted at the factory. The screw is covered with a plug to discourage unauthorized adjustments.

ADJUSTMENT
- Remove air cleaner, adapter and gaskets. Discard gaskets.
- Plug any vacuum line ports as required.
- With IAC valve connected, ground diagnostic terminal (ALDL connector).
- Turn on ignition, do not start engine. Wait at least 30 seconds (this allows IAC valve pintle to extend and seat in throttle body).
- With ignition "ON", disconnect IAC valve electrical connector.
- Remove ground from Diagnostic Terminal and start engine.

Stop Screw Plug Removal:

- Remove plug by first piercing it with awl, then apply leverage.
- Adjust idle stop screw to obtain:
500-550 rpm (in drive with automatic transmissions)
600-650 rpm (in neutral with manual transmissions)
- Turn ignition "OFF" and reconnect IAC valve electrical connector.
- Unplug any plugged vacuum line ports and install air cleaner adapter and new gaskets.