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 MANUALSSUBARU1985GL 4D SEDAN, 1.8 5, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMFUEL INJECTION SYSTEM - BOSCH AFCTESTINGFUEL PRESSURE
1985 Subaru GL 4D Sedan, 1.8 5, Standard
Fuel Pressure
1985 Subaru GL 4D Sedan, 1.8 5, StandardSECTION Fuel Pressure
NOTE:
Constant fuel pressure is maintained in fuel lines and component parts at all times. Relieve pressure before attempting to open system for testing. Do not allow fuel to flow onto engine or electrical parts or allow an open flame in area while testing fuel system components.
- To relieve fuel system pressure, unplug fuel pump connector and crank engine more than 5 seconds. Run engine until it stalls. Disconnect fuel hose at pressure regulator and install fuel pressure gauge using "T" fitting.
- Start engine and check fuel pressure at idle. Fuel pressure should be 26-30 psi (1.8-2.1 kg/cm2 ). Increase engine RPM and make sure fuel pressure increases correspondingly.
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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.