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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 >> Surge And/Or CHUGGLE

Surge And/Or CHUGGLE

SYMPTOM - SURGE AND/OR CHUGGLE

Possible Cause Correction
Incorrect pump timing See TESTS W/CODES article
Restricted air filter Check and/or replace air filter
Air in injection lines to nozzles Check fittings on lines
Faulty nozzle Replace nozzle; see SYSTEM/COMPONENT TESTS article
Improperly installed high pressure lines Remove lines, and reinstall properly
Misrouted or kinked vacuum lines Check lines, and reinstall properly
Faulty EGR operation Check EGR system
Faulty charging system Check alternator output
Faulty PCM operation See TESTS W/CODES article
Faulty TCC or shift points Check transmission operation