Sierra 3500 4WD V8-6.0L (2008)
2. Obtain a pressure drop value for each fuel injector.
3. Add all of the individual pressure drop values except for the injector suspected of being faulty. This is the total pressure drop.
4. Divide the total pressure drop by the number of fuel injectors that were added together. This is the average pressure drop. The difference between
any individual pressure drop and the average pressure drop should not be more than 20 kPa (3 psi).
^
If the difference between any individual pressure drop and the average pressure drop is more than 20 kPa (3 psi), replace the fuel injector,
E-85 only. All other engine, refer to Fuel Injector Cleaning.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure. See: Computers and Control Systems/Testing and
Inspection/Diagnostic Trouble Code Tests and Associated Procedures/Verification Tests and Procedures
Fuel Injector Replacement
