Symptom Diagnosis

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

• Engine Does Not Start (Will Not Crank)
• Engine Cranks, But Fails To Start
• Engine Backfires
• Loss Of Power
• Detonation (Engine Knock)
• Stalls At Idle
• Engine Runs Rough (Off Idle)
• Rough Or Unstable Idle
• Engine Misfires All Conditions
• Poor Fuel Economy
• Excessive Emissions