High CO - at High RPM

Condition: High Carbon Monoxide, normal or low Hydrocarbons during cruise (2500 rpm).

POSSIBLE CAUSE ACTION



Faulty canister purge system Check Fuel Evaporative System.


[1][2]PCV malfunction Check PCV system,


Restricted exhaust Check Catalytic Converter.



Initial timing incorrect Check base timing.
SEE Ignition System/ ADJUSTMENT PROCEDURES.

Check cam timing.



Incorrect Spark Advance Check Spark Controls.
SEE Ignition System/ TIMING SPECIFICATIONS


Fuel Injection malfunction Check fuel pressure.
Perform injector balance test.
Service Fuel Injectors (Pressure cleaner).