mfewtrail Posted December 19, 2003 Report Share Posted December 19, 2003 Do you guys think this would work for you in eliminating the MIL(check engine light) from removing the catalytic converter? http://people.umass.edu/jjbove/mil.jpg Found it on the stangnet forum btw...most over there claim to only use the capacitors and resistors to eliminate their rear o2 sensors..not sure if the same resistance values would be used for you guys or not though. Anyone that would happen to be electrically savvy..some input from you would be appreciated..maybe Vegeta? Thanks in advance! Quote Link to comment Share on other sites More sharing options...
Justin Posted December 20, 2003 Report Share Posted December 20, 2003 What you need is something that sends out a roughly .45V signal. An O2 sensor runs from .00 to 1.00 roughly, .00 being very lean and 1.00 being very rich. What you're getting for a code on OBDII vehicles when you remove the cat is "Catalytic Converter Efficiency < Acceptable Levels" which means that the downstream O2 is fluctuating from rich to lean similar to the upstream. A good cat maintains the signal to roughly .45, which is running perfect, not rich or lean. I'm no electronical magician, so I don't know what all parts are needed to drop the 5V ref. voltage to a .45V, but it probably has something to do with voltage dropping resistors. If it was me I'd probably get rid of the cat, remove the bulb and scan my car once a month or every oil change to make sure that's the only code, as it has no driveability issues, won't cause your mileage to go down, anything... Quote Link to comment Share on other sites More sharing options...
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