Engine Performance
Work Example 9

WorkKey Level: 3
NATEF Automotive Tasks: VIII.E.3.1, VIII.E.3.4

You are testing a catalytic converter using the temperature variation method. The converter temperature variation specification should read at least 600 degrees Fahrenheit.The inlet of the catalytic converter reads 500 degrees. The outlet also reads 500 degrees. Is the catalytic converter working properly?  Please explain.

Solution:

You need to see a change of at least 600^°F to determine if a catalytic converter is working properly.
outlet – inlet = 500 – 500 = 0
Since 0 < 600, the catalytic converter is bad.