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 article in the ENGINE PERFORMANCE section, and TESTS W/CODES - EEC-IV article 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
• 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
• Sulfur "Rotten Egg" Smell
• 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