2

Relieve fuel pressure by connecting Fuel Pressure Gauge (J34730-1) or equivalent to fuel pressure connection on fuel rail. Place fuel pressure gauge bleed hose in an approved gasoline container. With ignition off, open valve on fuel pressure gauge.

3

Record lowest voltage displayed by DVOM after first second of test. (During first second, voltage displayed by DVOM may be inaccurate due to initial current surge).

Voltage displayed by DVOM should be within specified range.
Voltage displayed by DVOM may increase throughout test as fuel injector windings warm and resistance of fuel injector windings changes.
An erratic voltage reading (large fluctuations in voltage that do not stabilize) indicates an intermittent connection within fuel injector.

FUEL INJECTOR SPECIFICATIONS

Resistance Ohms

Voltage Specification ⁽¹⁾

11.8-12.6

5.7-6.6

⁽¹⁾	Resistance should be taken with engine coolant between 50°F-95°F (10°C-35°C).

5

Injector Specifications:

FUEL INJECTOR SPECIFICATIONS

Highest Acceptable Voltage Reading Above/Below 95/50°F (35/10°C)	Acceptable Subtracted Value
9.5 Volts	0.6 Volts

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

Test Description

Use the Manual With the Right Hardware

When to See a Mechanic

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