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System Performance Check

  1. This check verifies that CEC system is functioning correctly. This check should always be made after any repair on CEC system.
  2. When performing this check, always engage parking brake and block DRIVE wheels. Remove bowl vent line at carburetor and plug hose at carburetor during check and reconnect it after the check is complete.
  3. The oxygen sensor may cool off after only a short period of time while engine is idling. This will cause engine to go into open loop. To restore closed loop mode, run engine at part throttle for several minutes and accelerate from part throttle several times.
NOTE: Although there are many charts connected with CEC diagnosis, only 2 charts are needed to prove the system is operating properly. Normally, only 3 charts are necessary to find a problem, if one exists.
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