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Home >> Pontiac >> 2002 >> Aztek AWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - System & Component Testing >> Fuel System (Bi-Fuel & CNG) >> Fuel Injector Balance Test With Special Tool >> Circuit Description

Circuit Description

The Fuel Injector Tester (J 39021) energizes CNG fuel injector 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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