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.
2003 Isuzu Axiom Base, 4WDFACTORY OEM SERVICE PROCEDURE
Test Description
- 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.
- 5 -
See FUEL INJECTOR SPECIFICATIONS
table: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).
Factory Service Tools
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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.
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