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 MANUALSTOYOTA1990TERCEL BASE, 2D COUPE, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - SYSTEM/COMPONENT TESTS - 4-CYL CARBURETEDTESTINGFUEL PUMP
1990 Toyota Tercel Base, 2D Coupe, Standard
Fuel Pump
1990 Toyota Tercel Base, 2D Coupe, StandardSECTION Fuel Pump
NOTE:
Fuel pump volume and pressure specifications are not available from manufacturer.
- Remove fuel pump. Before performing the following checks, run some fuel through fuel pump to ensure check valves seal.
- Without blocking outlet and return fittings, check amount of arm play and force required to operate fuel pump. The same amount of force should be used during the following inspection. See Fig 1, Fig 2 or Fig 3.
- Inspect inlet check valve. Block outlet and return fittings. Check for an increase in arm play and freedom of movement. Inspect outlet check valve. Block inlet fitting. Check that arm locks.
- Check pump diaphragm. Block off inlet and outlet fittings. Check that pump arm locks. Check oil seal. Block off vent hole and check that fuel pump arm locks. If fuel pump does not operate as described, replace pump.
RENDER: 1.0x
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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.