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2.9L & 3.0L V6 Tech General discussion of 2.9L and 3.0L V6 Ford Ranger engines.

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Old 09-24-2013
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removing the cat

downsides? aside from violating law is there a hinderence in performance? 99 3.0 flex
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Old 09-24-2013
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If I remeber right there should be a few cats. The last one I don't think as an o2 sensor, you can take that one out and get a little more sound. Make sure to always run a muffler though or else you won't have enough back pressure and you will lose low end torque.
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Old 09-24-2013
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thats what i was thinking. does the cat really hinder performance that much? as in will i notice a big difference without it
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Old 09-24-2013
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does the cat really hinder performance that much?
Doubt it.
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Old 09-24-2013
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You'll be fine removing the final cat
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Old 09-24-2013
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You'll be fine removing the final cat
just the final one?
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Old 09-24-2013
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You'll be fine removing the final cat
Fine - yes.

Gain anything - no
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Old 09-24-2013
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just the final one?
Yep


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Fine - yes. Gain anything - no
Didn't say anything about gains lol

Last edited by 99offroadrngr; 09-24-2013 at 09:45 PM.
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Old 09-24-2013
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Didn't say anything about gains lol
True, true

lol
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Old 09-24-2013
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unless you are boosted see and logan03CO you thought you were done...

You dont have to run any cats at all, but you need the proper tuning to make it run right.
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Old 09-24-2013
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i dont know if mine are stuffed up so i guess i'd try removing them if i dont need them. is it legal to remove the fina one, as in will a shop remove it and weld in a piece of pipe? i did that with my donut seal under the pass seat, and it was $20. so i imagine it wouldn't be much
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Old 09-25-2013
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Depends on the shop. Its not legal to remove any emissions items but they may.
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Old 09-25-2013
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The shop I went to didn't have an issue removing the last one.
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Old 09-25-2013
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Originally Posted by zabeard View Post
unless you are boosted see and logan03CO you thought you were done...

You dont have to run any cats at all, but you need the proper tuning to make it run right.
so what tuning do you speak of to make it run good without cats?

Last edited by rangerstepside; 09-25-2013 at 11:52 AM. Reason: spelling
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Old 09-25-2013
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Your O2 sensors measure based on the cats being there. Your computer needs to be tuned to know what the new reading will be
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Old 09-25-2013
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X3 to tuning. If you want to get rid of them all do that first then get a tuner and send your guy datalogs so he can adjust.

They also have mil eliminators for mustangs they I've heard work on a ranger
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Old 09-25-2013
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ok. sounds good to me i'd rathe rnot run cats. i have a jet performance ecm chip now but i think i'd rather go datalog
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Old 09-25-2013
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To get it to run worth a damn it's going to run a fair amount of $$$ for hardly anything in return....just saying.
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Old 09-25-2013
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thats kinda what i was getting at, is it worth it to take them out. how about just the rear?
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Old 09-26-2013
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Taking out the rear cat didn't give me a cel. You should be fine
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Old 09-26-2013
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Originally Posted by rangerstepside View Post
thats kinda what i was getting at, is it worth it to take them out.
You'll notice everyone is telling you that you will be 'alright' or 'fine' taking out the last one - but nobody is saying you will gain anything by doing it. lol

Just a little observation.


As far as the question about being 'worth it or not'? What's the endgame here? What positive is to be gained? Louder - Is that it?
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Old 09-26-2013
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Yeah there's no gain from it just a deeper tone. If you pull your last cat ask the shop if they'll cut you a deal if you let them keep the cat.

I wouldn't pull all of mine out, the last one only at most.
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  #23  
Old 09-26-2013
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Quote:
Originally Posted by logan03CO View Post
You'll notice everyone is telling you that you will be 'alright' or 'fine' taking out the last one - but nobody is saying you will gain anything by doing it. lol

Just a little observation.


As far as the question about being 'worth it or not'? What's the endgame here? What positive is to be gained? Louder - Is that it?
i've heard it takes back pressure off the motor. i have no clue about the 3.0 but if it does then i'd imagine it'd help a tad, but if there's no downside i'd remove the rear one, but i wasn't sure how much difference the cat made. i've also been told that they clog up over time and reduce power? not sure how much truth is behind that. but if it is true i'd imagine it's one less thing to worry about, and mine might be clogged and it'd help with clearing things up a bit?
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Old 09-26-2013
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The engine was tuned with exhaust so back pressure was already accounted for.

Reducing back pressure wouldn't help.

Cats clogging seem to be a myth as far as I'm concerned, it has to take a lot of miles with dirty exhaust to clog them to the point of having to replace them.
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  #25  
Old 09-26-2013
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gotcha, kinda what i wasd thinking. i found a shop that'll remove the rear cat, and put in a piece of steel pipe. at the very least i'll walk away with a deeper sound.
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