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 appropriate TESTS W/CODES article were performed before diagnosing a symptom. See the TESTS W/CODES menu at the top of this article. Symptoms available for diagnosis include the following.

Engine Will Not Start
Difficult Cold Start
Fast Idle Out Of Specification
Rough Idle When Warm
Idle RPM High When Warm
Idle RPM Low When Warm
Stalling During Warm-Up
Stalling After Warm-Up
Misfire Or Rough Operation
Emission Test Failure
Lack Of Power

NOTE: Some components are identified as part of a specific fuel injection system. For example, CIS-E or LH-SFI.