Symptom Diagnosis

Symptom checks cannot be used properly unless problem occurs while vehicle is being tested. To reduce diagnostic time, ensure steps in BASIC DIAGNOSTIC PROCEDURES article and appropriate SELF-DIAGNOSTICS article were performed before diagnosing a symptom. Symptoms available for diagnosis are as follows:

• ENGINE DOES NOT START 
• HARD START 
• STARTS & STALLS 
• HESITATION/STUMBLE 
• SURGE 
• LACK OF POWER/SLUGGISH 
• SPARK KNOCK/DETONATION 
• CUTS OUT/MISSES 
• BACKFIRE 
• RUNS ROUGH/UNSTABLE, ERRATIC IDLE 
• POOR FUEL ECONOMY