I know there a lot of theories involving eliminating the cats on an exhaust system. I'm trying to avoid the theories and am wondering if anyone has had any experience removing the cats and installing straight pipes on a 2000 discoII with the O2 sensors functioning properly?
De-cat
- Thread starter Parke_A_Saurus
- Start date
I did it to my 2001 P38. It didn't even throw a check engine light after I did it. I drove it like that for 2 years and then sold it.
it will be a lot louder, but not unbearable.
I keep thinking about doing it to my D2, but I like how quiet it is.
it will be a lot louder, but not unbearable.
I keep thinking about doing it to my D2, but I like how quiet it is.
it wont run right, the post cat o2's also control fueling with the bosch motronic system. it may or may not throw a light though.
why do you want to remove them anyway?
why do you want to remove them anyway?
I've been having other issues with the Rover. The whole story and everything involved with that is under a post titled "Finally becoming frustrated". So in lieu of going into the whole story here, and to save you some time of reading thru the entire PIA process that posting outlines, lets just say that my entire exhaust system got so hot that it was glowing red. So fairly certain that my cats are fried. Again.
The Pre-Cat O2 sensors send the info about fuel mixture for the fuel measurements, not the rear. The rear O2 sensors are only for emissions, to tell the CPU to throw a Check engine light for inefficient catalytic converters.
Not exactly. The post cat sensors do send mixture information to the ECM.
Op, doesn't springs have emissions testing? Or not?
Plus why not just fix the issues? A cat
Less d2 can't be sold.
No emissions down in Colorado Springs unless a dealer is selling a vehicle, and dont plan on selling the Disco. Not to say that I wouldn't, but no plans in the immediate future. If I did sell it, once I'm done with all the planned mods, it would only be to an off road enthusiast anyway. And it seems most of them aren't that concerned with things like that.
Is this what you are referring to?
"Post-Catalytic Converter Lambda Adaptation Diagnostic (NAS only)
On NAS vehicles the ageing effects of the pre-catalytic converter sensors are compensated for by an adaptive value
derived from the post-catalytic converter sensors. This is a long term adaption which only changes slowly. For a rich
compensation the additive value is added to the rich delay time. For a lean compensation, the adaptive value is added
to the lean delay time. The adaptive time is monitored against a defined limit, and if the limit is exceeded, the fault is
stored in the ECM's diagnostic memory and the MIL light is illuminated on the instrument pack."
Well I do believe we have a winner. I am removing the cats and sticking some test pipe under there. Of course this is for "testing" pupurposes only and will only be used in "off" road applications. Thanks for all the insight everyone and all the real world info mbrummal.
Yes. But it's not as long term as you would think. I had issues when I had my exhaust all jacked up. A cat and both rear sensors fixed it.
Op be ready a cat less exhaust stinks. Especially on the trail.
Op be ready a cat less exhaust stinks. Especially on the trail.
I am cat less as well. No foul smells from the exhaust either. I did make the mistake of cutting off my resonator though.
Why would this be? Seems contrary to everything I've experienced, which is that the cars WITH cats generate more of that sulfur smell.