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 TESTING and G - TESTS W/ CODES articles in the ENGINE PERFORMANCE Section were performed before diagnosing a symptom. Symptoms available for diagnosis include the following:
- Hard Starting (Cranks Okay)
- Engine Surges
- Lack Of Power, Sluggish Or Spongy
- Detonation/Spark Knock
- Hesitation, Sag Or Stumble
- Cuts Out, Misses
- Rough, Unstable Or Incorrect Idle
- Poor Fuel Economy
- Excessive Exhaust Emissions
- Engine Diesels
- Engine Backfires
NOTE:
Systems and components listed under each symptom may not be applicable on all models.