Quote:
Originally Posted by phobos512
There are O2 sensor simulators that people use when the cats are removed. And since it's California you don't have to get smogged for 6 years on a new vehicle. However in So Cal there are portable smog stations that sit by the highways and monitor your exhaust gasses, so you could still get nabbed by one of those.
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As he said, o2 simulators would work. Lots of tuners use them when they remove the cat's and want to keep from throwing a code. Basically what it does is sends a false signal to the vehicle saying all things are good. I haven't looked at the exhaust very closely on our trucks but if there are no pre-cat o2 sensors this option should be avoided as there would be no data for the trucks fuel trim besides what the dummy sensor is sending which would be nothing realtime. You still need pre-cat o2's either way.