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Home >> GMC >> 1996 >> Forward Control 7.4 N >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/O Codes - Diesel >> Symptoms >> Engine Stalls At Idle

Engine Stalls At Idle

SYMPTOM - ENGINE STALLS AT IDLE

Possible Cause Correction
Incorrect slow idle See TESTS W/CODES article
Faulty fast idle solenoid Replace solenoid; see SYSTEM/COMPONENT TESTS article
Plugged fuel return system Remove restrictions
Glow plugs turn off too soon Check glow plug system; see SYSTEM/COMPONENT TESTS article
Limited fuel to injection pump Check fuel delivery system
Air in injection lines to nozzles Check line fittings
Incorrect or contaminated fuel Remove and replace fuel
Faulty injection pump Replace pump; see REMOVE/INSTALL/OVERHAUL article
Fuel shut-off solenoid closes in RUN position Check solenoid operation; see SYSTEM/COMPONENT TESTS article
TCC stuck on Check brake switch and PCM control