Impala V8-5.3L (2008)
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.
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