Diagnosis & Testing: Notes

The CEC system should be considered as a possible source of trouble for engine performance, fuel economy and exhaust emission problems only after normal tests and inspections are performed. Normal tests and inspections are those that would apply to a vehicle without the CEC system (ignition system, carburetor, etc.).

The steps listed in the following charts will provide a systematic evaluation of each component that could cause a malfunction. After completing a repair, repeat the test to ensure that the malfunction has been corrected.