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.
1985 Chevrolet Impala 5.0 HFACTORY OEM SERVICE PROCEDURE
Fuel Pump
- Disconnect fuel line between fuel pump and filter. Place end of fuel line in measuring container.
- Turn ignition switch to "RUN" position. Pump should supply 1/2 pint (1/5 L) in 15 seconds. If not, disconnect inlet hose at pump and connect a vacuum gauge.
- Turn ignition switch to "RUN" position. Vacuum must be 5.3 in. Hg. If less, replace pump. If more, check fuel lines for splits, leaks, or kinks.
Factory Service Tools
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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.