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.

1991 Isuzu Rodeo LS, 4WD, AutomaticFACTORY OEM SERVICE PROCEDURE

Fuel Pump (Fuel Injected)

FUEL PUMP PERFORMANCE

Application

Unregulated Pressure psi (kg/cm² )

Regulated Pressure psi (kg/cm² )

Amigo & Pickup

2.6L

⁽¹⁾⁽²⁾ 42 (2.9)

⁽³⁾ 35 (2.4)

3.1L

N/A

9-13 (.62-.91)

Rodeo

2.6L

⁽¹⁾⁽²⁾ 43 (3.0)

⁽³⁾ 36 (2.5)

3.1L

N/A

9-13 (.62-.91)

Trooper

2.6L

⁽¹⁾⁽²⁾ 42 (3.0)

⁽³⁾ 35 (2.5)

2.8L

N/A

9-13 (.62-.91)

⁽¹⁾	With Vacuum Switching Valve (VSV) connector unplugged and pressure regulator vacuum hose disconnected.

⁽²⁾	With pressure regulator vacuum hose connected, 12 volts applied to Blue wire terminal and Black wire terminal grounded of VSV.

⁽³⁾	With pressure regulator vacuum hose connected and Vacuum Switching Valve (VSV) disconnected.

Factory Service Tools

Use the Manual With the Right Hardware

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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.