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.
1988 Chevrolet Sprint TurboFACTORY OEM SERVICE PROCEDURE
Secondary Air Control System
- Check hoses and pipes for cracks, kinks, damage or loose valve connections. Disconnect second air hose from air cleaner with engine cold.
- Start engine and run at idle speed. Check that air is drawn into hose (bubbling sound). Warm engine to normal operating temperature. Air should not be drawn into hose (no bubbling sound).
- Increase engine speed to 3000 RPM and quickly release accelerator pedal. Air should be drawn into hose. Disconnect coolant temperature connector. Connect a 10,000 ohm resistance jumper wire. See Fig 1 . Air should be drawn into hose at engine idle speed.
Factory Service Tools
Use the Manual With the Right Hardware
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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.