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Home >> Chevrolet >> 2002 >> Venture Base, Van Passenger Extended >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System & Component Testing >> Fuel System (Bi-Fuel & CNG) >> Fuel Injector Balance Test With Tech 2 >> Circuit Description

Circuit Description

The scan tool first energizes High Pressure Lock-Off (HPL) solenoid, Low Pressure Lock-Off (LPL) solenoid and CNG fuel injectors for a precise amount of time allowing a measured amount of fuel into manifold. This causes a drop in system fuel pressure that can be recorded and used to compare each fuel injector.

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