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Home >> Ford >> 1994 >> Explorer 2D Utility, RWD, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 37 (Engine Controls - Basic Testing) >> Fuel System >> Fuel Injectors >> Fuel Injector Check
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Fuel Injector Check

WARNING: This page is about a different car, the 1994 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.

Connect tachometer to engine. Start engine and allow to idle. Disconnect and reconnect injectors individually. If each injector causes a momentary drop in engine speed of at least 100 RPM, injectors are providing proper fuel delivery. RPM drop should only be momentary, as ISC will attempt to re-establish correct idle RPM. Replace any injectors not causing sufficient drop in engine speed.

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