Hisun HS800UTV - CHAPTER 8 TROUBLESHOOTING

ENGINE MANAGEMENT SYSTEM
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• Remove the fuel line connection from the injector
• Carefully clean debris from the interface surfaces. Do not damage seal mating surfaces.
• Remove the injector from the manifold
• Apply a light coating of a lubricant to both the upper and lower injector seal ring of the
replacement injector.
• Install the new injector into the manifold. Check that the injector is installed in the original
orientation to maintain proper spray targeting, and that the retaining clip is properly seated
on the injector and the fuel line
• Install the retaining clip after connecting the fuel line
• Tighten the injector mounting to the desired torque as mentioned in the manufacturer
manual
• Tighten the fuel line
• Re-install the injector electrical connector
• Check for fuel leaks with the key “on” and the engine “off”
• Start engine and verify proper operation.
• or spray pattern, do not rotate the injector in the fuel rail assembly to install the injector
electrical connector. This may dislodge the retaining clip, and result in improper spray
orientation
4．Replacement Techniques
WARNING:
The injector and all associated hardware may be extremely hot.
• Shut off ignition.
• Disconnect negative battery cable to avoid possible fuel discharge if an accidental attempt
is made to start the engine.
• Disconnect the electrical connector from the injector wiring harness.
• Relieve fuel pressure
• Remove the retaining clip from the fuel injector.
• Remove the fuel line connection from the injector
• Carefully clean debris from the interface surfaces. Do not damage seal mating surfaces.
• Remove the injector from the manifold
• Apply a light coating of a lubricant to both the upper and lower injector seal ring of the
replacement injector.
• Install the new injector into the manifold. Check that the injector is installed in the original
orientation to maintain proper spray targeting, and that the retaining clip is properly seated
on the injector and the fuel line
• Install the retaining clip after connecting the fuel line
• Tighten the injector mounting to the desired torque as mentioned in the manufacturer
manual
• Tighten the fuel line
• Re-install the injector electrical connector
• Check for fuel leaks with the key “on” and the engine “off”
• Start engine and verify proper operation.