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Home >> Buick >> 2003 >> Century Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - System Testing & Engine Component Tests - 3.1L >> Fuel Systems >> Fuel Injector Balance Test With Tech 2 >> Circuit Description

Circuit Description

The scan tool first energizes the fuel pump and then the fuel 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.

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