View Full Version : Removing cats for OBD2 cars?

03-30-2004, 11:17 PM
What are your experiences with removing the cats on the OBD2 cars? Won't the downstream O2 sensor throw a fit without the cat, and put the engine into some sort of limp-in mode?

03-31-2004, 01:27 AM
On my Prelude the ECU checks emissions every 3rd driving cycle. Because I have the backup power fuse to the ECU pulled it resets every time I turn off the car so I never get a CEL.

03-31-2004, 01:56 AM
There is also an emulator available that mimicks the operation of a rear O2 sensor. I can find out more if desired.

Peter Linssen
ITB Opel Manta
Pacific NW Region