Initial Inspection and Diagnostic Overview

VISUAL INSPECTION CHART
1. Visually inspect the components of the exhaust system and related controls that may affect exhaust gas quality or cause backfire or loss of power.
2. Inspect the wiring and connectors of the solenoids and other components for obvious problems due to looseness, corrosion, or other damage. This must be done while the engine is fully warmed and the system controls are activated.
3. Check the vacuum lines and connections for looseness, pinching, leakage, splitting, blockage, or other damage.
4. If a vacuum line or orifice (restrictor) blockage is suspected, correct the cause before proceeding to the next step.
5. Check the engine oil for fuel dilution.
6. If the fault is not evident, proceed to the Symptom Chart.