Symptom Related Diagnostic Procedures

NOTE: If the vehicle exhibits any of the following symptoms and an Emission Control System component is suspect, be sure to visually inspect the following before any tests are performed:
1. Vacuum hoses for leaks, splits, kinks and proper routing.
2. Ignition wires for cracking, hardness and proper connection at the Distributor and Spark Plugs.
3. Wiring harnesses for proper routing and connection.

Determine if any fault codes are stored in the Engine Control Module (ECM). Correct any faults indicated before proceding.

SYMPTOM:

ROUGH IDLE
1. Positive Crankcase Ventilation (PCV) System

FAILS EMISSION TEST
1. Three Way Catalytic Converter
2. Evaporative Emission Controls

LOSS OF POWER
1. Three Way Catalytic Converter