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Home >> Dodge and Ram >> 1992 >> Pickup D150, 2D Pickup Extra Cab, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests - Diesel >> Fuel System >> Fuel Control >> Fuel Injector

Fuel Injector

  1. To determine which fuel injector is defective, operate engine and loosen high-pressure fuel line nut at fuel injector.
    CAUTION: Carefully loosen high-pressure fuel line nut. Fuel is under excessive pressure and will spray out around fuel line nut.
  2. Listen for a change in engine RPM. If engine RPM decreases, fuel injector is operating properly. If engine RPM stays the same, fuel injector or engine components are defective. Ensure all high-pressure fuel line nuts are tightened to 18 ft. lbs. (24 N.m).
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