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 MANUALSMAZDA1990626 LX, 4D HATCHBACK, 2.2 1, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCEENGINE CONTROLS - SPECIFICATIONSFUEL SYSTEMFUEL PUMP
1990 Mazda 626 LX, 4D Hatchback, 2.2 1, Automatic
Fuel Pump
1990 Mazda 626 LX, 4D Hatchback, 2.2 1, AutomaticSECTION Fuel Pump
NOTE:
Fuel pump performance is a measurement of fuel pressure and volume availability, not regulated fuel pressure.
FUEL PUMP PERFORMANCE
| Application | Pressure psi (kg/cm2 ) | Min. Vol. in 30 sec. Pts. (L) | |
|---|---|---|---|
| B2200 (Carbureted) | |||
| Electric Pump | 2.8-3.6 (.20-.25) | 1.1 (.66) | |
| Mechanical Pump | 3.7-4.7 (.26-.33) | .9 (.43) | |
| RX7 | 71-92 (5.0-6.5) | 2.24 (1.0) | |
| All Others | |||
| Main Fuel Pump | 64-85 (4.5-6.0) | 1.1 (.66) | |
| Transfer Pump (4WS) | 5.7 (0.4) | 1.0 (.57) | |
REGULATED FUEL PRESSURE
| Application | At Idle w/ Vacuum psi (kg/cm2 ) | At Idle w/o Vacuum psi (kg/cm2 ) |
|---|---|---|
| B2200 (PFI) & B2600i | 28-37 (2.0-2.6) | 38-46 (2.7-3.2) |
| Miata | 31-38 (2.2-2.7) | 38-46 (2.7-3.2) |
| MPV | 30-37 (2.1-2.6) | 38-46 (2.7-3.2) |
| MX-6 & 626 | 27-33 (1.9-2.3) | 34-40 (2.4-2.8) |
| Protege & 323 | 30-37 (2.1-2.6) | 38-46 (2.7-3.2) |
| RX7 | 27-33 (1.9-2.3) | 34-40 (2.4-2.8) |
| 929 | 31-38 (2.2-2.7) | 38-46 (2.7-3.2) |
RENDER: 1.0x
NO RELATED
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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.