Engine Controls - Tests W/O Codes: Symptoms: Notes

Symptom checks cannot be used properly unless problem occurs while vehicle is being tested. To reduce diagnostic time, ensure steps in BASIC TESTING and appropriate TESTS W/CODES articles in the ENGINE PERFORMANCE section were performed before diagnosing a symptom. Symptoms available for diagnosis are as follows:

• No Crank
• Hard Start/Long Crank
• Stalls After Start
• No Start/Normal Crank
• Slow Return To Idle
• Rough Idle
• Fast Idle (Diesels/Runs On)
• Low Idle (Stalls On Deceleration)
• Hesitates Or Stalls
• Surge (On Acceleration Or Cruise)
• Backfires
• Loss Of Power
• Spark Knock
• Poor Fuel Economy
• Emissions Compliance
• Warning Indicator Lights
• Improper Transmission Shift
• High Oil Consumption
• Engine Runs Hot (Overheating)
• Engine Runs Cold
• Exhaust Smoke
• Sulphur "Rotten Egg" Smell
• Diesel Engine (Engine Induced Symptoms)
• Diesel Engine (Transmission Induced Symptoms)
• Engine Noise
• Vibration
• A/C System Not Functioning (Lack Of Cooling)
• A/C System Always On
• A/C Clutch Does Not Disengage Under WOT Conditions