Hey,
I have a friend with a 99 civic si. He FINALLY put an exhaust on it and then I put a test pipe on for him to replace the stock CAT. I hooked the O2 sensor back up just how it was on the stock cat and the car ran great for about two days. Then his engine light came on and the car started running really sluggish. I unhooked the battery for a while (to hopefully reset the computer) and I also checked the sensor to make sure everything was ok.
It looked fine and so I hooked the battery back up and the Engine light was off. We took the car out and it ran great. After about 20 miles, the light was back on and it was running crappy again.
I've heard of other people having the same problem and A different friend that has a 2000 civic si had the same problem as well. He cut his O2 sensor off (which is just plain idiotic).
Anyways, I've asked around a million places, and nobody seems to have an answer for me. In the meantime, my friend has put his stock CAT back on and the car is back to running good.
What is the solution for this problem? There has to be one, or else they wouldn't sell test pipes for these cars.
Please help.......thanks in advance
I have a friend with a 99 civic si. He FINALLY put an exhaust on it and then I put a test pipe on for him to replace the stock CAT. I hooked the O2 sensor back up just how it was on the stock cat and the car ran great for about two days. Then his engine light came on and the car started running really sluggish. I unhooked the battery for a while (to hopefully reset the computer) and I also checked the sensor to make sure everything was ok.
It looked fine and so I hooked the battery back up and the Engine light was off. We took the car out and it ran great. After about 20 miles, the light was back on and it was running crappy again.
I've heard of other people having the same problem and A different friend that has a 2000 civic si had the same problem as well. He cut his O2 sensor off (which is just plain idiotic).
Anyways, I've asked around a million places, and nobody seems to have an answer for me. In the meantime, my friend has put his stock CAT back on and the car is back to running good.
What is the solution for this problem? There has to be one, or else they wouldn't sell test pipes for these cars.
Please help.......thanks in advance