LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Ford >> 1994 >> Probe Base, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 43 (Engine Controls - Basic Testing - V8) >> Fuel System >> Fuel Injectors >> Fuel Injector Check
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Fuel Injector Check

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 1994 Mercury Grand Marquis, 1994 Mercury Cougar, 1994 Lincoln Town Car, 1994 Lincoln Mark VIII, and 1994 Ford Thunderbird. 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  .
scientia non olet · About LEMON Manuals