Assuming all your Oldsmobile Aurora's emission systems are function properly
(particularly the ignition system, i.e. sparkplugs, sparkplug wires, coil)
it might be time to change the catalytic converter. The Bureau of Automotive Repairs actually disallows replacement of the CAT until all other emissions components have been inspected and no faults found, or found and repaired, and a vehicle still produces high emissions. The Catalytic Converter, commonly referred to as the CAT is a component designed to continue the combustion process within itself and emit a more thoroughly burned and less harmful emission containing exhaust. A good CAT should dramatically reduce HC, CO and NOx. The CAT is a catalyst, it plays a very small part on how well your engine runs and it only begins working after slightly rich exhaust has exited the engine's combustion chambers. The most accurate way to find out if your Oldsmobile's CAT is working properly is by using an exhaust gas analyzer (smog machine). You should visit a local smog station and have the smog technician inspect the CAT with their smog machine.
posted by SmogTips Support
