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Catalytic Converter

Discussion in 'Suzuki Carry' started by DRW, Mar 30, 2008.

  1. DRW

    DRW Member

    I wanted to say thanks to Draggbody for making mention of the manifold type cat on a Suzuki Carry, I had asked someone about my 91 having one because of the sensor screwed into it,o2 I am guessing and the smell of my exhaust, but was told it did not have one.It does, or did have the honeycomb style in the manifold.There is a definite improvement in performance with it gone.
     
  2. jay woods

    jay woods Member

    DRW, Thanks for posting this. I have wondered about the same thing on my hijet. It is a 93 and has what looks to be a CAT just after the exhaust manifold. My exhaust is in good shape but I can't help but think if this is a CAT and I either took it off or cleaned it out it would help. What did you do to yours?

    Thanks jay
     
  3. larryn2o

    larryn2o Member

    can you post a pic?
     
  4. draggbody

    draggbody Member

    no problem... if you follow from the manifold there is a "canister" unbolt the flange and take a big *** screwdriver and break it out... crank it up and it will blow alot of stuff out, turn it off and repeat process until its clean...

    for those that missed the theory, the misfire allow raw fuel to enter the exhaust and then it ignites, super heating the exhaust, melting the catalyst, thus clogging it up...
     
  5. larryn2o

    larryn2o Member

    any idea why some trucks don't come with cats? i've seen a few newer ones without one and an older truck of the same make with a cat.
     
  6. DRW

    DRW Member

    Some of the newer trucks may be using the manifold type cat,on my 91 Suzuki there is nothing under the truck to see from the manifold back but the header pipe,muffler and tail pipe.The actual honeycomb in the manifold was about 2.5" thick and was no problem to break apart,the results were well worth the effort.
     
  7. jay woods

    jay woods Member

    It was in the actual manifold itself?
     
  8. DRW

    DRW Member

    The manifold looks to be two pieces,with the lower piece being a cast iron cat,which is something I have never seen.I will take a picture of it and post it.
     
  9. DRW

    DRW Member

    Manifold Cat

    Here is a picture of the "manifold cat" on my 91 Carry.
     

    Attached Files:

    Wayne Marion likes this.
  10. larryn2o

    larryn2o Member

    daihatsu cat


    mine is a 1996 and only has a intake air preheat but no cat that i can tell.
     
  11. jay woods

    jay woods Member

    Mine is the same larry, nothing that looks like a cat!
     
  12. chris oakley

    chris oakley New Member

    does a 1994 carry have a cat converter built into the manifold , I do not see one in the exhaust system of my carry. but I have noticea my carry loosing power latley and need help upping the hp. Thanks, Chris
     
  13. j.newell

    j.newell New Member

    I have a 92 carry and i need to find spark plug gap and degree for timimg
     
  14. slimbad

    slimbad Member

    j.newell, First -Welcome to the forum. You will find what you need in this thread:

    http://www.minitrucktalk.com/showthread.php?t=2775

    There is more info in the "Suzuki Carry Reference" section:)

    prob a better place to request this info also

    later, slim
     
  15. Don-in-Japan

    Don-in-Japan Member

    Many front wheel drives converters are set up the same way.. right after the manifold. Maybe to keep weight stresses closer to the front?

    I may be wrong, but I recall some of the newer EFI minis passing emissions tests without cats. The PPM's are pretty low with 660cc's. Rated more like motorcycles.
     
  16. BHuffman

    BHuffman New Member

    Removing manifold-type catalytic converter

    I've been using PB Blaster for a few weeks now to prepare to unbolt the flange, so I can break the catalytic converter out of the manifold.

    I have a question. Do I need to take any precautions when I use the big screwdriver to break it up? Is there any chance of damaging the O2 sensor or anything else?

    Thanks for your help,
    Bob
     
  17. Don-in-Japan

    Don-in-Japan Member

    Wear some breathing protection, as the materials are hazardous to your health..
     
  18. erixun

    erixun Bronze Supporting Member

    Post some pics and tell us what happened! Good, bad or indifferent, I am interested if you actually get some performance gain! thanks.
     
  19. huntidaho

    huntidaho Member

    I have a 94 carry and I have wanted to remove the cat and I have taken the pipe from the manifold to look inside to see honeycomb but I didnt see anything. Do I need to remove the manifold??:/ Please post some pics of anything you have to help me out.
    Thanks.
     
  20. Don-in-Japan

    Don-in-Japan Member

    If you take off the "down pipe" right after the manifold it may contain the converter.. but it is usually obviously larger than a standard tube. Further down (away from the heat) is usually where it is.

    Keep in mind, these cats are not the old pellet type from the 70's and 80's. They flow decently, and usually the only thing that will change is the tone of the exhaust note. Consider as well the exhaust pulses exit easier with a well formed, straight exhaust. Empting out a converter canister can create a low pressure area halfway down the exhaust.. and creating some noisy/misdirected pulses, effectively reducing power. I would not recommend removing the material from the canister, but rather welding a straight pipe, bypassing it smoothly.

    Also, some exhausts may not have converters at all. Mine does not, and passes inspections no problem...as well as my donor truck. My friend had the same year, but a 4WD version, and his had one. Go figure...
     
    Last edited: Nov 23, 2009

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