NOTE: Fuel pump performance is a measurement of fuel pressure availability, not regulated pressure.

FUEL PUMP PERFORMANCE

Application

⁽¹⁾ psi (kg/cm² )

Samurai & Sidekick (TBI)

⁽²⁾ 34.1-39.8 (2.4-2.8)

Sidekick (MPI)

⁽³⁾ 35.6-42.7 (2.5-3.0)

Swift

DOHC

⁽³⁾ 35.5-38.4 (2.5-2.7)

SOHC

⁽⁴⁾ 22.7-29.9 (1.6-2.1)

⁽¹⁾	Key on and engine off.

⁽²⁾	Pressure should maintain at least 21.3 psi (1.5 kg/cm² ) for one minute after fuel pump is turned off.

⁽³⁾	Pressure should maintain at least 25.6 psi (1.8 kg/cm² ) for one minute after fuel pump is turned off.

⁽⁴⁾	Pressure should maintain at least 12.8 psi (.9 kg/cm² ) for one minute after fuel pump is turned off.

REGULATED FUEL PRESSURE

Application

psi (kg/cm² )

Samurai

⁽¹⁾⁽²⁾ 24.2-29.9 (1.7-2.1)

Sidekick

MPI

⁽¹⁾⁽³⁾ 29.8-37.0 (2.1-2.6)

TBI

⁽²⁾⁽⁴⁾ 34.1-39.8 (2.4-2.8)

Swift

DOHC

⁽¹⁾⁽³⁾ 25.6-29.9 (1.8-2.1)

SOHC

⁽¹⁾⁽⁵⁾ 12.8-20.0 (.9-1.4)

⁽¹⁾	Engine idling.

⁽²⁾	Pressure should maintain at least 21.3 psi (1.5 kg/cm² ) for one minute after fuel pump is turned off.

⁽³⁾	Pressure should maintain at least 25.6 psi (1.8 kg/cm² ) for one minute after fuel pump is turned off.

⁽⁴⁾	Key on and engine off.

⁽⁵⁾	Pressure should maintain at least 12.8 psi (.9 kg/cm² ) for one minute after fuel pump is turned off.

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.

Safety Warning

Fuel Pump