2006 GMC Canyon 4WD L4-2.8L VIN 8FACTORY OEM SERVICE PROCEDURE

Fuel Injector Balance Test With Special Tool



FUEL INJECTOR BALANCE TEST WITH SPECIAL TOOL

SYSTEM DESCRIPTION

Fuel Injector Balance Test Example (Actual Results May Vary):

Factory service manual diagram



The scan tool is first used to energize the fuel pump relay. The fuel injector tester is then used to pulse each injector for a precise amount of time, allowing a measured amount of fuel into the manifold. This causes a drop in system fuel pressure that can be recorded and used to compare each injector.

TEST DESCRIPTION

Step 1 - Step 5:

Factory service manual diagram



Step 6 - Step 8:

Factory service manual diagram



The number below refers to the step number on the diagnostic table.
3. The engine coolant temperature (ECT) must be below the operating temperature in order to avoid irregular fuel pressure readings due to hot soak fuel boiling.
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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