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Home >> Isuzu >> 2003 >> Ascender 5.3 P, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Engine Controls - System & Component Testing - 4.2L) >> Fuel Systems >> Fuel Injector Balance Test With Tech 2 >> Circuit Description

Circuit Description

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Scan tool first energizes fuel pump and then 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 injector.

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