O2 Simulator

Brian5475E · Post by **Brian5475E** » Tue Aug 03, 2004 10:47 pm

I was wanting to know if anyone here has used a O2 simulator to replace their 2nd O2 sensor when removing their cat. I'm wanting to remove my cat and put a test pipe. If anyone has, let me know where you got it from and how to intall it on a lanos. Lucky here in Ohio they only plug the EPA testing computer to the car computer on the OBD II. so no inspection. Anyhelp would be appriciated

Fishbone · Post by **Fishbone** » Thu Aug 05, 2004 8:16 pm

I used 02 sims on a previous car to replace the rear O2's when I yanked the cats and ran a straight pipe. Can't help you with the install on a Lanos, but it shouldn't be too different for any car. It just plugs into the O2 sensor wire and I tucked it up out of the way and secured it with some tie wraps. Worked great - no "check engine" light and no other issues with using it.

Post by **PrecisionBoost** » Sun Aug 08, 2004 11:46 pm

I manufacutred my own bypass tube when I first purchased my Lanos and I found no significant difference in power so I put it back on.

My car only had a few thousand miles on it when I did it but perhaps it might help out when the car gets higher mileage and the cat starts to get clogged up.

I was going to throw it on a dyno and see if there was any difference but I sold the Lanos to a friend and purchased an Optra 5 ( Daewoo Lacetti ) so it was never tested.

Wolf-Spirit · Post by **Wolf-Spirit** » Mon Aug 09, 2004 8:15 am

well i removed my cat... cat installed car pulls up to 5000-5500 rpm easy whitout it i can do 6000-6250 easy.. seams to restrict the engine power on high RPM onnly? could maybe even help it on lower rpm's as for mine prolly has to low backpresure on the exhaust but i really want those 6250rpm's (6250 cuase limiter is there tbh could go higher if it wasnt there)