Close

Q: Failed No's toohigh on 1991 Cadillac Fleetwood

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
Everything passed except failed smog no's too high
(2) Answers
(1) Comments
I believe you need to be looking at reasons your engine is running lean, creating a high amount of oxygen in your exhaust gas. This could be due to an air intake leak, a vacuum leak, or a sluggish oxygen sensor (or two). Some folks change catalytic converters for this - I would not do that unless you find that testing indicates the catalyst efficiency is compromised. Good luck.
| |
Need more inforamtion onthe car,but usually first thing I would suspect is the egr system,timing too far advanced, cataltic converter....good luck