Symptom Diagnosis: Notes

CAUTION: When battery is disconnected, vehicle computer may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION before disconnecting the battery.

Symptom checks cannot be used properly unless problem occurs while vehicle is being tested. To reduce diagnostic time, ensure steps in BASIC DIAGNOSTIC PROCEDURES article and appropriate SELF-DIAGNOSTICS article were performed before diagnosing a symptom. Following symptoms are available for diagnosis:

Hard To Start (Cranks Normally)
No Start (Cranks Normally)
Rough Or Unstable Idle
High Idle After Warm-Up
Engine Stalls
Engine Misfires Or Has Lack Of Power
Engine Runs Rough On Deceleration
Backfire In Exhaust System
Poor Fuel Mileage
Excessive Oil Consumption
Abnormal Noise Or Knocking