Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1986 Chevrolet Camaro Base, 2.8 S, StandardFACTORY OEM SERVICE PROCEDURE
Idle Air Control (IAC) Valve
- Measure distance that IAC valve is extended from motor housing. Measuring from gasket mounting surface of housing to end of pintle, distance should not exceed 1 1/8" (28 mm). If valve is extended too far, damage will result to valve during installation.
- Identify IAC valve as being Type 1 (collar at electrical end) or Type 2 (without collar). See Figure . If valve was extended greater than 1 1/8", reduce distance as explained in step 3).
- On Type 1 (collar at connector) IAC valve, push pintle inward with slight side-to-side motion. On Type 2 (no collar at connector) IAC valve, compress pintle retaining spring toward IAC body while turning pintle inward with clockwise motion. On IAC valves without collar, return spring to original position with straight portion of spring end aligned with flat surface under pintle head.
- Install IAC valve on throttle body using new gasket. Tighten IAC valve. Connect electrical lead to IAC valve and install air cleaner. Start engine and allow it to reach normal operating temperature. Drive vehicle at least 30 MPH to allow ECM to reset idle speed.
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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