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.
1997 Geo Metro BaseFACTORY OEM SERVICE PROCEDURE
Fuel Pressure
- Release fuel pressure. See FUEL SYSTEM PRESSURE RELEASE . Ensure negative battery cable is disconnected. Disconnect PCV hose and Intake Air Temperature (IAT) sensor connector. Remove air cleaner assembly. Remove fuel inlet hose from throttle body. Install Fuel Pressure Gauge (J-34730-1) and Adapter (J-34730-75). See Fig 1.
- Reconnect negative battery cable. Reconnect PCV valve hose and IAT sensor connector. Install air cleaner assembly. Start engine and idle at normal operating temperature. Check fuel pressure. See FUEL PUMP PERFORMANCE table. If fuel pressure is not as specified, see CIRCUIT TEST DIRECTORY table under CIRCUIT TESTS. If fuel pressure is as specified, release fuel pressure. Remove fuel pressure gauge and reinstall components removed. Start engine and check for leaks.
FUEL PUMP PERFORMANCE
| KOEO (1) psi (kg/cm2 ) | Engine @ Idle psi (kg/cm2 ) | (2) Hold Pressure psi (kg/cm2 ) | ||||
|---|---|---|---|---|---|---|
| 23-31 (1.6-2.2) | 13-20 (0.9-1.4) | 13 (0.9) | ||||
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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.