Converter Efficiency Charts
Converters can only work efficiently if the engine is operating properly and the exhaust is leak tight. The charts at the bottom show the typical relationship of engine exhaust. Converter effiency and resulting tailpipe emissions measured during emission tests. Both too-rich or too-lean conditions can cause emission failures.
HC | CO | NOx | Possible Cause or Recommended Action |
High | High | High | Replace converter and O2 sensor: verify tune-up and correct any faults. |
High | Low | High | Replace converter, tune-up & check lean AFR, leaking exhaust valves |
Low | High | High | Replace converter and O2 sensor |
High | High | Low | Rich AFR, air Injection |
High | Low | Low | Run-In converter, tune-up, oil change |
Low | Low | High | EGR, lean ARF, leaks, run-in converter, use larger converter. |
Low | High | Low | O2 sensor, rich AFR |
151 Tinker Court
Dothan, AL 36303
Toll Free: 1-800-264-8035
550 Wharton Drive
Atlanta, GA 30336
Toll Free: 1-800-467-9917
1000 11th Court West
Birmingham, AL 35204
Toll Free: 1-800-553-5582
197 Upper Ty Ty Rd
Tifton, GA 31793
Toll Free: 1-800-848-1072
801 W. Highland Drive
Fulton, KY 42041
Toll Free: 1-800-326-7572
1715 Nova Road
Holly Hill, FL 32117
Toll Free: 1-800-342-1870
5022 Harding Place
Nashville, TN 36303
Toll Free: 1-866-808-7680
7340 Westport Place
West Palm Beach FL 33610
Toll Free: 1-800-276-6399
5210 E Hanna Ave
Tampa, FL 35204
Toll Free: 1-800-282-3854
102 Murray Avenue
Wynne, AR 72396
Toll Free: 1-800-851-5905
1886 E. Brooks Road
Memphis, TN 30336
Phone: (901) 937-5373
4209 Space Center Drive
Jackson, MS 39209
Phone: 1-800-553-5582
12 Locations to serve you better!
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