Spirit and Acclaim Service Manual #81-270-9025
A MULTI-POINT FUEL INJECTION 14-57Vehicle Speed Oxygen Sensor State Baro. Read Update
Throttle Body Minimum Air Flow Check Procedure
(1) Warm engine in Park or Neutral until the cooling fan has cycled on and off at least once.
(2) Hook-up timing check device and Tachometer.
(3) Disconnect the coolant temperature sensor and set basic timing to 12~ BTDC +/- 2~ BTDC.
(4) Shut off engine.
(5) Disconnect 3/16" manifold vacuum purge line from the top of the throttle body. Cap the 3/16" throttle body nipple.
(6) Connect Diagnostic Readout Box II (DRBII).
(7) Restart the engine, allow engine to idle for at least one minute.
(8) Using the DRBII, access Min. Airflow Idle Spd. The following will then occur:
- AIS motor will fully close.
- Idle spark advance will become fixed.
- Engine RPM will be displayed on Diagnostic Readout Box II (DRBII).
(9) Check idle RPM with tachometer, if idle RPM is within the below specification then the throttle body min. air flow is set correctly.
Odometer Reading (Below 1000 miles): 600-1100 rpm
(Above 1000 miles): 650-1100 rpm
If idle RPM is not within specification replace throttle body.
(10) Shutoff engine.
(11) Remove DRBII.
(12) Disconnect timing check device and tachometer
(13) Reconnect purge line to throttle body.
Ignition Timing Procedure Refer to Group 8D "Ignition System."
FIGURE 23 - 14-WAY (SMEC) CONNECTOR:
WIRING CONNECTOR PIN DESCRIPTION
14-Way Single Module Engine Controller (SMEC) Connector
Spirit and Acclaim Service Manual Publication # 81-270-9025 Revised TSB 18-05-89 April 3, 1989