Quote:
Originally Posted by Phantom
I think you would have three methods for doing it and having the computer play nice.
1. Get a O2 spoofer these are usually are used to make the car think the CAT is still there or used when you do not want to spend the money on the post cat O2 sensor.
Wire up a switch so you can turn on the fake O2 when you turn off an injector. With some work you could possibly use one switch to do both.
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I don't think that would work, the O2 sensor in the manifold and the post cat O2 sensors are very different creatures: The post cat only determines if there's a difference fore and aft of the cat, whereas the one in the manifold actually gets a fairly precise stoichiometric reading.
Of course this could have changed on newer cars, I mostly work on pre-2010.