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:

Engine Starting Problems

• No Crank
• Crank But Will Not Start
• Tries to Start But Will Not
• Starts, But Takes A Long Time

Engine Quit

• Right After Starting
• While Idling
• On Acceleration
• During Steady Speed Driving
• Right After Starting
• On Deceleration
• Right After the Vehicle is Brought To a Stop

Engine Idle Problems W/The Vehicle Not Moving

• Engine Speed is Too Slow All the Time
• Engine Speed is Too Slow When the A/C is On
• Engine Speed is Too Fast
• Engine Speed is Rough or Uneven

Engine Problems While The Vehicle is Moving

• Runs Rough
• Bucks and Jerks
• Hesistates/Stumbles on Acceleration
• Misfires - Cuts Out
• Engine Knocks or Rattles
• Lack of Power
• Backfires
• Poor Fuel Economy