Resignator

Discussion in 'General Discussion' started by mike2004srt10, Apr 7, 2015.

Car Parts
  1. mike2004srt10

    mike2004srt10 Full Access Member

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    So I am thinking of doing a rear CAT delete this spring. Also was thinking of removing the resignator. I was looking underneath the truck yesterday and noticed it didnt have one. Looks factory still, no evidence of removal. Did some years come without them?

    Also will removing the CATS pop a code? Do I need a tune? All I have for upgrades is a K&N CAI.
     
  2. oldcolt

    oldcolt Striker Heads and Cam Supporting Member

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    Removing the rear cats will not set off a code. The front cats are the ones that are monitored. You do not need a tune for the mods that you have mentioned.
     
  3. VPRPWRD

    VPRPWRD VTCoA Ring Leader Supporting Member

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    04 did not have a resonator in the exhaust.
     
  4. seethrough

    seethrough Member

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    Are you sure on this? I thought this would trigger a cat converter efficiency code? I could be wrong - it has happened before.:D
     
  5. oldcolt

    oldcolt Striker Heads and Cam Supporting Member

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    As long as the O2 sensors are left alone, removing the rear cats will not cause a code. The rear cats, or as I like to call them "flame arresters", are not monitored by the truck's computer.
     
  6. VENOMOUS1 RACING

    VENOMOUS1 RACING Has Left the Room - Banned from VTCOA!

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    No resonator on 04 and if rear sensors read same or close to same as fronts, code will be thrown. Let them breathe air outside exhaust and all is good ;)
    Zip tie to trans or frame :)
     
  7. VENOMOUS1 RACING

    VENOMOUS1 RACING Has Left the Room - Banned from VTCOA!

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    Oh, and just so you know they are resonators, not resignators. :)
    Oh and Catalytic Converters, not Cadillac Converters lmfao :rofl:
     
  8. CaptnCrash

    CaptnCrash Full Access Member

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    Bad advice, rears have to transition, and tying them to the frame will not do that and after 3 driving cycles it will throw a code.

    SIMMs or tuning are the only options.
    --CC
     
  9. VENOMOUS1 RACING

    VENOMOUS1 RACING Has Left the Room - Banned from VTCOA!

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    Lol I've gone years like this and done many exactly the same way without issue. They have to remain plugged in and be a functional sensor, but otherwise works. As long as they don't closely resemble front O2 readings it's fine. Yes Tuning them out is superior but not all who do exhaust have tuning done or ever have had.
     
  10. CaptnCrash

    CaptnCrash Full Access Member

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    Oh geez! I call BS ! You really should read the FSM before you make statements like that. My statement that the post cat O2's must transition and the 3 trips deal is straight from the FSM, confirmed by my experience over the past 16 years. You should also research the federal standards / requirements for monitoring systems, you'd find that the strategy for doing that can not be subverted in that manner. All JTEC's use the same strategy's for detecting bad O2, bad fuel injector, etc, regardless of the engine, 6,8,10 cyl.

    The PCM must see transitions within a specific range or it will set a MIL, again per the FSM.

    My statements are specific to the JTEC PCM but are generally true for any of the JTEC and newer MOPAR NGC PCM's.

    A few more things,
    (1) They don't transition when they're out of the pipe.
    (2) They get really hot like 660'F that's what those 2 white wires are for. They would damage anything near them that's not metal including the tie wraps you have holding them.
    (3) Better hope they don't get wet because after a few times of that they will cease to work at all. That's why O2 sensors are placed in an exhaust system at an angle to prevent condensate build up in the sensor.

    The only way what you suggest would work with a JTEC style PCM which is what these trucks use is *IF* you had them disabled via a tune. Most of the tuners do that.

    I've heard this one more times than I can count then a few weeks later they come back looking for SIMMs or some other solution.

    If what you are saying is true there would NEVER have been a market for SIMMs. On newer cars and even some of the older ones, the spark plug fouler and steel wool trick may or may not have worked, but even that required the O2 sensors be in the pipes.

    --CC
     
  11. VENOMOUS1 RACING

    VENOMOUS1 RACING Has Left the Room - Banned from VTCOA!

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    I agree with you the correct way is to tune them out bud. I'm simply saying the JTEC is fooled easily. It's a very old and slow PCM! I be successfully done this on my own truck for years before I ever tuned them out. Rain, sleet, snow and all! They were zip tied by wires, I understand and knew it was a heated element O2.
    These PCMs often fail to note a bad TPS, IAC, O2,Cam/Crank sensor as well as other issues. They are dinosaurs of the PCM era IMO. They have no issue finding catalyst issues, auto trans issue (sometimes) or ABS but often
    Engine mgmt IsSues are not within out of range enough to throw a DTC ;)
    Regardless I agree it's a solution only for those without SCT at the time, not a permanent solution. :)
     
  12. NukeGM/Ford

    NukeGM/Ford Active Member

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    they said REAR cats......... are there 4 or only 2??
     
  13. VENOMOUS1 RACING

    VENOMOUS1 RACING Has Left the Room - Banned from VTCOA!

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    4- two honeycomb style and two wire type. Like OldColt said, rear are more like a flame arrester.
     
  14. NukeGM/Ford

    NukeGM/Ford Active Member

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    so when i see a header advertisement with cats they only show 2, thats all we get??
     
  15. VENOMOUS1 RACING

    VENOMOUS1 RACING Has Left the Room - Banned from VTCOA!

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    Yessir two high flow cats usually.