Air/Fuel Mixture: Testing and Inspection
INSPECT CO/HCa. Start the engine.
b. Run the engine at 2,500 rpm for approximately 180 seconds.
c. Insert the CO/HC meter testing probe at least 40 cm (1.3 ft.) into the tailpipe during idling.
d. Immediately check the CO/HC concentration during idling and/or at 2,500 rpm.
HINT:
- Complete the measurement within 3 minutes.
- When carrying out the 2 modes (idling and 2,500 rpm) test, the measurement orders are prescribed by the applicable local regulations.
e. If the CO/HC concentration does not comply with regulations, troubleshoot in the order given below.
(1) Check the heated oxygen sensor operation.