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 MANUALSMAZDA1991626 DX, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCEENGINE CONTROLS - SPECIFICATIONSFUEL SYSTEMFUEL PUMP

1991 Mazda 626 DX, Automatic

Fuel Pump

1991 Mazda 626 DX, AutomaticSECTION Fuel Pump

NOTE: Fuel pump performance measures 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)

Navajo

⁽¹⁾

.0 (.49)

RX7

71-92 (5.0-6.5)

⁽¹⁾

All Others

Main Fuel Pump

64-85 (4.5-6.0)

1.1 (.66)

Transfer Pump (Protege 4WD)

5.7 (0.4)

1.0 (.57)

⁽¹⁾	Information is not available.

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)

Navajo

⁽¹⁾

⁽²⁾

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)

⁽¹⁾	Pressure should be 30-45 psi (2.2-3.2 kg/cm² ) with engine running and 35-45 psi (2.5-3.2 kg/cm² ) with key on and engine off.

⁽²⁾	Information is not available.

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.