Contour Enthusiasts Group Archives Forums Modifications Duratec Performance using o2 sims

can using o2 sims on gutted pre cats or headers and or cats hurt your cars ability to throw a check light for other running probs? or dose it just tell the car your cats are running right? and would i pass emissions with them

The Eliminators will stop any check engine light that pertains to the downstream o2 sensors. They will not harm your car.

You'll pass emissions with them, but if they're smart and look under the car, you might be screwed. My mechanic is somewhat of a prick, so I'm used to this happenning.

The mil eliminators are made to trick the computer to think the pre cats are properly functioning. The upper o2 sensor will send a reading (a measure of resistance I think) to the computer then the lower o2 sensor will send another reading to the computer. These two reads should show a change, meaning the pre cat is functioning properly. All the mil eliminators do is alter the signal sent to simulate a working pre cat.