Rep Power: 277

i been running my car with the megan hi flow test pipe which is a downpipe and replaces the entire cat. i believe its only my secondary o2 sensor thats been reading the bad signals to the computer to throw off the cel light but i wanted to know if i were to install an o2 simulator from www.bigjoshracing.com or any other, after getting rid of the cel light, can i expect my car to perform better in any case?

 
Rep Power: 454

it wont perform any better, it will just turn off the cel light.

 
Rep Power: 277

im not sure who but i think it was either gearbox or civic01vtep* that said cel lights affect your cars performance.. so that got me curious if i were to fix the problem, would it make it better?

 
Rep Power: 454

But your not actually fixing the problem. If I remember correctly, your o2 sensor is reading too much airflow or something like that, and throwing that light on. Now the o2 simulator is just going to turn that light off, not fixing the problem. Now I am pretty sure down the line if you start to have any real problems, you wont know because the engine light wont come on.

The whole reason that light is on is because you have basically no cat on the car. So there is your performance issue right there.

 
Rep Power: 318

just wondering how is the performance like since the pipe installed. notice anything?

 
Rep Power: 0

I have had the megan pipe installed with no CEL does it take a while to come on (for example 4-5 months?) because it's been a while since I installed mines...

 
Rep Power: 353

the light will still come on for other problems but not for the o2 sensor. so you wont know if your o2 sensor went bad.

 
Rep Power: 0

One problem with the cel light coming on though is this, If you dont have an o2 simulator on then you dont know if the cel light is being triggered by something else going bad.