TrailBlazer 4WD L6-4.2L VIN S (2002)
Fuel Injector: Testing and Inspection
Fuel Injector Balance Test with Tech 2
CIRCUIT DESCRIPTION
The scan tool first energizes the fuel pump and then the injectors 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
Fuel Injector Balance Test With Tech 2 - Steps 1-5