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.
Fuel Pump Test 3
Connect a 8-10" hose and a pressure gauge to fuel pump outlet line. Hold gauge so it is about 16" above fuel pump. If equipped, pinch off fuel return line. Start engine and idle on fuel in carburetor. Fuel pressure should be 5.5-6.5 psi (.39-.46 kg/cm2 ). If pressure is too low, too high or varies greatly with RPM change, replace fuel pump.
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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.