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 MANUALSCHEVROLET1985NOVA BASE, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMFUEL PUMPINSPECTION & TESTINGPRESSURE TESTMECHANICAL
1985 Chevrolet Nova Base, Standard
Pressure Test: Mechanical
1985 Chevrolet Nova Base, StandardSECTION Mechanical
- Disconnect fuel line from carburetor. Connect line to a pressure gauge. Hold gauge about 16" (406 mm) above pump level. Pinch off fuel return line (if equipped).
- Start engine and allow to idle (using gas in carburetor bowl). Observe pressure gauge. Pressure should be about 4-7 psi (.28-.49 kg/cm2 ) for 4 and 6-cylinder engines, and about 6-9 psi (.42-.63 kg/cm2 ) for V8 engines.
- Replace pump if pressure is too high or low, or if pressure varies greatly with the engine speed.
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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.