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Remove cat.

bowtechguy

bowtechguy

New member
Hey all, ever since I had a missfire n ran my car for a couple days that way my Cat. has been stinking and now I'm getting a slight rough idle. So I was wondering, what will it hurt to cut the Cat. out and run a straight pipe in its place? Would it mess with the O2 sencor behind it?
 


yeah, sorry, it's O2 simulator, sometimes I type in shorthand too much. ZZPerformance and WBodyStore both sell them, I believe. I got one from ZZP I've been meaning to pull since I got a tuner, just haven't gotten around to it.

I believe there's even a way to accomplish it with a simple resistor, but I've never tried that.
 


Bio248 said:
that doesnt work because it wouldnt be able to mimic a wave. its not just a steady voltage that it wants to see.
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Yeah, I've heard that, but I've also heard people claim success with it. I wouldn't think it would be reliable, but the sims aren't exactly reliable, either, they tend to go bad after a while. Tuner FTW!
 
So its best to leave the O2 secsor if I take out the Cat.
Hopefully soon I can get a new Cat. anyway.
Thanks
 
If you leave the sensor in, you'll throw a code and the check engine light would come on. I guess if that's not a problem for you, then yeah, you'd be fine.
 
Scimmia said:
Yeah, I've heard that, but I've also heard people claim success with it. I wouldn't think it would be reliable, but the sims aren't exactly reliable, either, they tend to go bad after a while. Tuner FTW!
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yeah, my sim started being intermittent so i just put the sensor back in since i still have a cat anyway.
 


bluegtp91 said:
The :P Smiley meant a joke :th_winking:
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lol, I replied too quickly, must have missed that. There's actually a lot of people who do just that, my dad's even driving around with the MIL on because of an EVAP problem we've never completely tracked down.
 
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