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.
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HOMESERVICE MANUALSCHEVROLET1985S10/T10 P/U 4WD L4-119 1.9LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSADJUSTMENTSFAST IDLE SPEED
1985 Chevrolet S10/T10 P/U 4WD L4-119 1.9L
Fast Idle Speed
1985 Chevrolet S10/T10 P/U 4WD L4-119 1.9LSECTION Fast Idle Speed
4-119 2 Bbl. ENGINE
1. Allow engine to reach normal operating temperature.
2. Disconnect and plug vacuum lines at distributor, idle compensator and EGR valve.
3. Check to ensure that fast idle speed is approximately 3,200 RPM. Adjusted throttle valve opening at first step of fast idle cam should be 16 (manual transmission) or 18 (auto. transmission) degrees.
4. If fast idle speed is not as specified, adjust fast idle cam screw as required.
RENDER: 1.0x
NO RELATED
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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.