Diagnostic Notes (Read Before Proceding)

Before replacing any vehicle component, inspect connector or connectors for pin or cavity damage that may result in a poor connection or an open circuit.

The following additional items should be checked as possible causes:
1. Engine Vacuum - Must be at least 13 inches in neutral.
2. Engine Valve Timing - To specifications.
3. Engine Compression - To specifications.
4. Engine Exhaust System - Must be free of any restrictions.
5. Engine PCV System - Must flow freely.
6. Engine Drive Sprockets - Cam and crankshaft.
7. Torque Converter Stall Speed - To specifications.
8. Power Brake Booster - No internal vacuum leaks.
9. Fuel Contamination - High alcohol and water content.
10. Fuel Injectors - Rough idle may be caused by injector control wire not connected to correct injector.
11. Technical Service Bulletins - Any that may apply to vehicle.
12. Engine Secondary Ignition Check - Any abnormal scope pattern.

Any one or more of these items can give a driveability related problem. They cannot be overlooked as possible causes.