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Old 05-06-2011
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Cat Converter problems

I got a 96 4.0 v6 ranger. Im looking to do a cat delete on my ranger but ive been hearing many different stories about it. Some people say the cat creates back pressure my engine needs. The local napa store said that since i have an o2 censor before and after the cat it would mess up my engine preformance. Lastly i have heard that removing the cat would increase the engine preformance but would not hurt it. Im looking for some confermations on these stories that I have heard.

Thanks, Hunter
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Old 05-06-2011
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Old 05-06-2011
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Its been 20 mins chill out
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Old 05-06-2011
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didn't hurt my 89 had 1 O2 sensor before cat, slight improvement, better sound from my after market muffler, not as great as some people say, punch it out, and either leave it hollow or put straight pipe though them you most likely need it for the visual inspection, don't feel bad about hollowing it out, due to federal law, scrap yards can't take catalytic converters as what they are since the rash out break of people taking them off cars a while back
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Old 05-06-2011
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You can get something that will take the place of the cat so your engine dosen't throw a CEL.
but just removing the cat and not replacing the o2 sensors will throw a code and you will have a CEL.
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Old 05-06-2011
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Check your state's emission and inspection laws before you remove a cat.
Also , Rangers come with high flow cats from the factory , removing it won't really gain you anything , unless you have/had a problem with the engine such as blowing a lot of oil or antifreeze out the exhaust.
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Old 05-07-2011
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Quote:
Originally Posted by StxDangerRanger View Post
You can get something that will take the place of the cat so your engine dosen't throw a CEL.
but just removing the cat and not replacing the o2 sensors will throw a code and you will have a CEL.
I was looking to put just a pipe in its place. I already put a glasspack inplace of my muffler.
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Old 05-07-2011
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well again check the state safety and emissions laws, if you need emissions then it wont pass obviously, if you state is like pa then it needs it for the visual safety inspection as well, i had straight pipe in my old truck but then again i also know a guy who passed it for me
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