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 MANUALSCHEVROLET1985CHEVY VAN G30, 5.7 M, 400/M40REPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCEADJUSTMENTTUNE-UP - DIESELADJUSTMENTSIDLE SPEED (RPM)2.2L
1985 Chevrolet Chevy Van G30, 5.7 M, 400/M40
Idle Speed (Rpm): 2.2L
1985 Chevrolet Chevy Van G30, 5.7 M, 400/M40SECTION 2.2L
- Set parking brake and block drive wheels. Place transmission in Neutral. Connect tachometer. Start engine and warm to normal operating temperature. Loosen lock nut on idle speed adjusting screw. See Fig 1 .
- Turn adjusting screw to obtain curb idle speed. Tighten lock nut. Apply vacuum to fast idle actuator. Loosen lock nut on fast idle actuating screw. Adjust knurled nut to obtain fast idle speed. Tighten lock nut.
IDLE SPEED (RPM) - 2.2L
| Curb Idle | Fast Idle |
|---|---|
| 800 | 925 |
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.