Symptom Diagnosis

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

Hard Start/Will Not Start
High Idle
Unstable Idling
Hesitation
Poor Driveability
Engine Stall
Backfire

NOTE: Recommended procedures for symptoms listed above are given in numbers from 1 to 28. See SYMPTOM PROCEDURE DEFINITION.