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 MANUALSCHEVROLET1989V 20 P/U 4WD V8-454 7.4LREPAIR AND DIAGNOSISSPECIFICATIONSMECHANICAL SPECIFICATIONSCOMPUTERS AND CONTROL SYSTEMSSYSTEM SPECIFICATIONS
1989 Chevrolet V 20 P/U 4WD V8-454 7.4L
System Specifications
1989 Chevrolet V 20 P/U 4WD V8-454 7.4LSECTION System Specifications
Throttle body to Intake manifold 16 Nm (12.0 lb-ft)
Fuel Meter Cover Assembly 3.0 Nm (28.0 lb-in)
Fuel Meter Body Assembly 4.0 Nm (30.0 lb-in)
Fuel Inlet Nut 40.0 Nm (30.0 lb-ft)
Fuel Outlet Nut 29.0 Nm (21.0 lb-ft)
Fuel Lines 23.0 Nm (17.0 lb-ft)
Throttle Position Sensor (TPS) Attaching Screws 2.0 Nm (18.0 lb-in)
Idle Air Control Valve (IAC) 3.2 Nm (28.0 lb-in)
Fuel Filter Union Nuts 26.0 Nm (20.0 lb-ft)
Fuel Meter Cover Assembly 3.0 Nm (28.0 lb-in)
Fuel Meter Body Assembly 4.0 Nm (30.0 lb-in)
Fuel Inlet Nut 40.0 Nm (30.0 lb-ft)
Fuel Outlet Nut 29.0 Nm (21.0 lb-ft)
Fuel Lines 23.0 Nm (17.0 lb-ft)
Throttle Position Sensor (TPS) Attaching Screws 2.0 Nm (18.0 lb-in)
Idle Air Control Valve (IAC) 3.2 Nm (28.0 lb-in)
Fuel Filter Union Nuts 26.0 Nm (20.0 lb-ft)
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.