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Home >> Mercury >> 1994 >> Villager LS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Fuel System >> Fuel Control >> Fuel Injectors
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Fuel Injectors

  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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