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.
1991 Geo Metro XFiFACTORY OEM SERVICE PROCEDURE
Fuel Pressure
- Release fuel pressure. See FUEL PRESSURE RELEASE under FUEL SYSTEM. Disconnect negative battery cable. Remove air cleaner assembly. Remove fuel inlet hose from throttle body and install Fuel Pressure Gauge (J-34730-1) with Adapter (J-34730-75). See Fig 1 .
- Install negative battery cable. Check fuel pressure. See FUEL PUMP PERFORMANCE table. For complete Fuel System Pressure Test Procedure See DIAGNOSTIC CHART A - 7. Release fuel pressure and remove fuel pressure gauge.
FUEL PUMP PERFORMANCE
| Application | Pressure psi (kg/cm2 ) | ||
|---|---|---|---|
| Metro | (1) 23-30 (1.6-2.1) | ||
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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.
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