Preliminary Inspection

NOTE: Perform this step after Verifying Customer Complaint and performing a Visual Inspection.

NOTE: System fault codes are cleared whenever the control unit or the battery is disconnected. Therefore, all fault codes should be read prior to any vehicle power interruption or troubleshooting.

Any Of The Following Should Not Be Overlooked As The Possible Cause Of A Driveability Problem;

- Engine Valve Timing - Set to specifications?
- Engine Compression - Within specifications?
- Engine Exhaust System - Free of any restrictions?
- Engine PCV System - Free of any restrictions?
- Engine Drive Sprockets - Cam and crankshaft correct installation/timing belt not damaged/broken?
- Torque Converter Stall Speed - To specifications?
- Power Brake Booster - Holds vacuum?
- Fuel Contamination - High alcohol or water content?
- Fuel Injectors - Rough idle may be caused by injector control wire not connected to correct injector
- Technical Service Bulletins - Any that may apply to vehicle?
- Engine Secondary Ignition Check - Any abnormal scope patterns?