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Home >> Mercury >> 1993 >> Villager LS >> Repair and Diagnosis >> External Pages >> Different car >> Section 7 (Engine Controls - System/Component Tests) >> Fuel System >> Fuel Control >> Fuel Injectors
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Fuel Injectors

WARNING: This page is about a different car, the 1994 Mercury Villager. 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. If each injector causes a momentary drop in engine speed of at least 100 RPM, injectors are giving proper fuel delivery. RPM drop should only be momentary as IAC will attempt to re-establish correct idle RPM.
  2. RPM should drop only momentarily, as IAC will attempt to re-establish correct idle RPM. Replace any injectors that do not cause sufficient drop in engine speed.
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