Removeing cat's on 2002 rodeo-PLEASE HELP!

[The Chosen One]

I have a 2wd 2002 3.2 v6 auto isuzu rodeo thats been taken care of better than you could possibly imagine. I want to take the cat's COMPLETELY out of the picture and run a nice set of 2 3/4" duals. How can I get around the O2's. I know I will need wideband O2's but how many and what else do I do. Im not completely Car stupid and my friend is really good as we have done numerous engine swaps n troubleshooting but If someone has done this or can help I would much appritiate it.

Id really hate to megasquirt(stand alone) this truck just to lose the cats. If I end up having to then she's going twin turbo and im throwing a mua5 or compriable 5 speed to her.

ANYONE?............Please........

[amigo-2k]

You would need to reprogram the ECU somehow.

If you want real sound, bolt in a flow master 50. If you want real power, bolt in a super charger (they make a bolt on kit for your engine). Cutting out the cats will only gain you a couple of HP.

If you check out ebay I think they sell cat delete pipes that you can bolt into your current setup.

As for your pipe size, I wouldn't go bigger then 2.25" on a v6, if you go bigger then that you will loose HP due to the back pressure being too low. Others with Rodeo's have gone bigger then 2.25 and that is what they have reported, and then they went back to 2.25.

[The Chosen One]

I agree with you on the 2.25" pipes. As for a super charger Im not very interested in. Im not looking for power nor really the sound. I just hate the cats and want them gone. I did see the cat-b-gone pipes but there still poses the problem of the 4 O2's that will read incorretly if I put the cat-b-gone pipe's on.

[The Chosen One]

Does anyone know of a eprom update or addition that will solve this problem?and where would I get it?

[amigo-2k]

You would have to send your ECU to someone to have it reprogrammed, or buy a used one from a junk-yard and send that one in.

I don't think you are going to find very many folks chiming in here about reprograming ECU's and cutting out the Cats.

you may want to try posting your question here:

http://forum.planetisuzoo.com/viewfo...2ba613744905dd

[Gizmo42]

Personally I wouldnt bother with removing the cats. They are non restrictive and you really dont gain anything except more pollution and the headaches of trying to work around it.

Besides cat converters are federaly mandated which takes precidnece over any local laws. So if someone wanted to push it, removing them is a federal crime.

[Cat Fuzz]

I just don't see any benefit to removing the cats on such a vehicle. You're only going to cause more problems.

[The Chosen One]

LOL Well thanks guys.....at least Im headed in the right direction. I do wonder though How when you ask one question you get 5 questions answered you didnt ask? Im not trying to be rude but I really dont care about the law's. Im sure theres 500 other laws you guys broke along the line somewhere doing something.

I mean if choppin off cats is supposed to help the enviornment right(and thats the whole reason to them)how is adding a supercharger to produce more power and consume more fuel doing anything differant. Or adding larger tires to produce more lag n strain to use more fuel. Also if Cats arent restrictive then why does everyone hate them...Why do you get better gas milage without them(If you drive respectively BOTH ways) Or if they are NON restrictive why do they add power if you DYNO it?

All in all- I just want to remove them and am trying to figure out if I have to buy only 2 Wideband O2's?And what other factors am I gonna run into.

Thanks again for the HELPFUL info to those of you that supplyed it.

[Cat Fuzz]

No need to be an ass about it. You post something on a public forum you're going to get input from many different perspectives. Go ahead and remove your cats and just deal the check engine light being on all the time. Too little benefit for the hassle, though. Any HP gain is going to be tiny.

[The Chosen One]

But by doing that the CEL light being on will not only be the problem.....When you screw with Cats n O2's you mess with the way the other components work. It will give false readings and either lean or richen the truck too much. you will run into MAF sensor reading wrong and coolant sensors pushing the truck to rich to the limit. Lots of variables go into stuff like this.

I am NOT trying to be an ass and SORRY for comeing off that way But I am a very serious person and I guess I dont come across as a Nice guy. I guess my expectations of people are high because people's expectations of me are always high. I dont come to the forums to play games or throw out useless info just to gain post counts. I come to the forums for answers from others more knowledgeable than myself and when I gain experiance from it I share it with others bottom line.

Sorry for being an ASS if I come across that way...I dont mean to but Im just a very serious person when I seek answers as I am sure most you guys are also when you seek answers.

[amigo-2k]

I really don't know how many answers you are going to find here, or on Planetiszuoo or on the 4x4wire. I have been reading these forums for 9 years now and I don't recall of anyone posting about wanting to remove the cats from a +98 isuzu.

Even the guys that have multiple of 1000's of dollars in their rigs haven't cut out the cats





As others have stated you will spend hundreds dollars (if not up to 1000 bucks) just trying to make your truck work correctly).

The only true power gainer is a supercharger (you will only pick up 10-15 with a high flow filter and muffler). Pace Headers made a couple of prototypes of headers, but they found out that they didn't increase the HP, meaning Isuzu did their job out of the box with OEM headers.)

[The Chosen One]

You guys are Die hard supercharger pushers....LOL -Are you all salesman...lol? I feel like Billy Bob Thorton on Bad santa saying he dont want No dam sandwiches - but I feel that way about superchargers.

Anyways Thanks for the reply's

[Cat Fuzz]

You're not getting the point. What others are saying is that the only way to gain some HP is with a supercharger. Other than that, you're not getting enough bang for your buck doing other things.

[The Chosen One]

Ok I understand that ------BUT Im not wanting to lose them for the HP or the sound or for ANY reason whatsoever at the present time.... I just want to get rid of them. AFTER they are GONE!!! - THEN is when I will work on Performance hop ups. You guys swear by superchargers but I hate them. Have you guys ever seen what 1700-2200 degree temps do to a cat? They are nothing more than honeycomb ceramic internals and the melt -CLOGGING up where your exhaust needs to go. When I bolt on these 2 T-5's I can reach 1700 degree's EASILY. Granted I may not sustain those temps but only temporary here n there but I dont want the dang worry of cats meltin down. YES I know you can melt a piston- YES i know its an aluminum block But TIL i figure out how to get past these dang cat's then their is absolutly NO reason in me advanceing any further in my project. I CAN HOWEVER stop wasteing my time searching for THE CORRECT way to do it and just simply run a stand alone setup(megasquirt) and get rid of the F-in cats and not need ANY of Izusu's and OBD 2's crappy ECU junk...Then I can move foreward. Screw emmissions and the people that make things harder than they should be by their junk OBD2 systems.

I resolve problems 1 at a time and getting rid of these cats are my first problem. After that I deal with others. NOW do I still need a dam supercharger?

[Dober89]

yep you sure do