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Home >> Ford >> 1996 >> Probe Base, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 12 (Engine Controls - Basic Testing - 2.0L) >> Fuel System >> Fuel Injectors >> Fuel Injector Check
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Fuel Injector Check

WARNING: This page is about a different car, the 1995 Mercury Mystique, 1995 Ford Probe, and 1995 Ford Contour. However, it is still accessible from the selected car via links, so may be relevant.
  1. Connect tachometer to engine. Run engine at idle. Disconnect and reconnect injectors individually. When disconnected, each injector should cause a momentary drop in engine speed of at least 100 RPM. Engine RPM drop should only be momentary as Powertrain Control Unit (PCM) will attempt to re-establish correct idle RPM.
  2. Replace any injectors that do not cause sufficient drop in engine speed. When test is complete, check idle speed. Refer to emission control specifications on decal in engine compartment. See IDLE SPEED & IGNITION TIMING.
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