Symptom Diagnosis

Symptom checks cannot be used properly unless problem occurs while vehicle is being tested. To reduce diagnostic time, ensure steps in appropriate articles were performed before diagnosing a symptom:

For Contour & Mystique 2.0L, see BASIC TESTING - 2.0L and TESTS W/CODES .

For Contour & Mystique 2.5L, see BASIC TESTING - 2.5L and TESTS W/CODES .

For Windstar, see BASIC TESTING and TESTS W/CODES .

Symptom checks are listed in order of probability, ease of accomplishment, and accessibility. Symptoms available for diagnosis are as follows:

• No Crank
• Hard Start/Long Crank
• No Start/Normal Crank
• Slow Return To Idle
• High Idle (Diesels/Runs On)
• Low Idle (Stalls On Deceleration)
• Rough Idle, Stalls, Misses, Hesitation Or Surge
• Backfires
• Loss Of Power
• Spark Knock
• Poor Fuel Economy
• Emissions Compliance
• Warning Indicator Lights
• Improper Automatic Transmission Shift
• Tachometer, Speedometer Or Fuel Gauge Inoperative
• High Oil Consumption
• Electric Cooling Fan Does Not Run At Low/& Or High Speed
• Electric Cooling Fan Always On
• Exhaust Smoke
• Fuel Smell
• Engine Noise
• Climate Control (Lack Of Cooling)
• Climate Control (A/C Always On)
• A/C Does Not Turn Off During WOT
• Brakelights Always On Or Off
• Sulfur Smell
• Fuel Pump Always Runs