Cimarron V6-173 2.8L (1986)
Manual transmission
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650 +/- 50 RPM in neutral (1986)
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675 +/- 50 RPM in neutral (1987)
Proceed to Step 3. If the minimum idle speed is greater then specified above, refer to Section 6E3-B, Symptoms, "Rough, Unstable or Incorrect
Idle, Stalling" in the appropriate model year Service Manual and perform the procedures outlined in that section, located at the end of this bulletin
3.
Disconnect the negative battery terminal.
4.
Remove the mass airflow duct at the throttle body.
5.
Cover the throttle position sensor (TPS) and Idle Air Control Valve (IACV) to protect them from overspray.
6.
Clean the throttle body bore in the area behind the throttle plates. Use a shop towel with GM Top Engine Cleaner (P/N 1052626), AC-Delco
Carburetor Tune-Up Conditioner (P/N X66-A), or any equivalent cleaner that does not contain methyl ethyl ketone.
7.
Reinstall the mass airflow duct. Connect the negative battery terminal.
8.
Recheck the minimum idle speed per Service Manual procedures. Adjust to the specifications given above, if necessary.
For warranty purposes, use Labor Operation T6229 at 0.5 hours.
