catalyic converter problem

Lincoln LS

  1. antonio fuller

    antonio fuller Well-Known LVC Member

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    Ok so when I bought this last 2006 LS it need new coils I didn't have the money so I had to just drive it awhile with the bad ones this caused fuel to get in the converter and blow it out
    I usually run all OE parts but the converters don't come apart from the exhaust from the factory and its over 2k for the system so I went the cheap way had the converters cut and stuck two cheap ones in. This fixed my problem so I thought but now the check engine light comes on after the car has been parked for the day the next day the light is off. I didn't change the sensors and my question is should I change the sensors are is it a issue with the converters I replaced it with


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  2. RigsLS

    RigsLS Dedicated LVC Member

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    Downstream sensors are doing their job, why shoot the messenger?

    Let me guess ... P0420 or 430 ??? (I think)

    You're running too rich, clean the MAF sensor. Check for vacuum leaks and be sure your new coils and plugs are good. It's dumping too rich of a fuel/air mix into the CAT's

    It could of course be faulty O2 downstream sensors on either bank, you'd have to take some readings to be sure or simply get the parts cannon out and try your luck.

    Possibly ... of course
     
  3. elephantrider

    elephantrider Dedicated LVC Member

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    aftermarket cats aren't going to be telling the downstream o2's that they
    are doing a factory level job at scrubbing the exhaust.

    if you have a local tuner, you can have them turn the rear o2's off, and
    your codes will go away. you will need to check your states inspection
    details and make sure on how many not ready's you can have.
     
  4. 04_Sport_LS

    04_Sport_LS Dedicated LVC Member

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    ??????

    The cats don't tell the o2 sensors anything. All the downstream o2 sensors do is read unburned fuel. Cheap cats have less platinum... so do a less better job of cleaning up unburned fuel. The downstream o2 sensors are probably doing their job correctly,,, and the cheap cats are probably at fault like Antonio suspects.
     
  5. elephantrider

    elephantrider Dedicated LVC Member

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    that's exactly what i'm saying. hello.
     
  6. RigsLS

    RigsLS Dedicated LVC Member

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    Hello!!! Haha, lot of that going around these days, now that the garbage has been taken out, we need to get back to properly understanding and helping one another.

    +1
     
  7. 04_Sport_LS

    04_Sport_LS Dedicated LVC Member

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    Maybe that's what you were saying... but that's not how I was reading it a 3am. No Offense intended.
     
  8. 1LoudLS

    1LoudLS Dedicated LVC Member

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    still getting a CEL after replacing cats with aftermarket just like almost every other person that has done the same...

    #ParForTheCourse



    long story very short, cheap parts often do not function nearly as well as OEM parts. this is often very important when a part is required to operate with in a certain measured tolerance.
     
  9. grizzlyls

    grizzlyls Dedicated LVC Member

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    I have always wondered, if you had to go on the cheap for a cat replace, wouldnt it be better to go to a junkyard and find a low mileage unit?

    Crossing my fingers on mine that the original owner didnt do any harm....
     
  10. milehighmikey

    milehighmikey Dedicated LVC Member

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    From what I recall, used parts resellers cannot sell you used cats. Best bet would be to find someone parting one out, even though that is probably still illegal to sell them that way as well.
     
  11. grizzlyls

    grizzlyls Dedicated LVC Member

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    Figures. I know they steal them all the time here in CA, so must be a market for them, at least the melt down version. Easy way to get around any law though is buy a junker, swap its cats, take to junkyard. :cool: Your the owner of two vehicles at one point, they cant say word one or likely even prove you did it.
     
  12. 1LoudLS

    1LoudLS Dedicated LVC Member

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    with the extremely high rate of coil failure on the LS, I would expect most cats pulled from junked out cars would at least have some damage to them if not completely gone already.
     
  13. antonio fuller

    antonio fuller Well-Known LVC Member

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    Rite I wouldn't do the work getting it out install etc just to find out its bad are bad two months later


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  14. LQ1906

    LQ1906 Active LVC Member

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    Is there a formal way to test if your cat is already damaged? What are your options besides paying $2k for new ones?
     
  15. 1LoudLS

    1LoudLS Dedicated LVC Member

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    if car doesn't have a CEL on, then cats are within OEM specifications. if CEL points to cats and its not a sensor issue, then your cats are most likely not within OEM specifications.

    aside from that you can have your emissions system tested (assuming of course that the rest of the engine is in tip top shape)

    options

    1, do nothing and hope it doesn't get bad enough(clogged) to completely choke out the engine, then live with CEL being on*

    2, hollow out clogged cat, then live with CEL being on*

    3, buy cheaper aftermarket cats and hope your one of the lucky few that it works and keeps the CEL off, or possibly live with CEL being on*

    4, buy $2k OEM cats that will work perfectly fine until next case of coil failure which then may damage them and start the whole problem over again.




    * If CEL is on, and you live in an inspection state, then this is most likely not an option for you.
     
  16. elephantrider

    elephantrider Dedicated LVC Member

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    If you buy aftermarket cats, go to a local tuner and have them turn the rear o2 sensors off. As long as you can have at least 1 not ready, your good.
     
  17. antonio fuller

    antonio fuller Well-Known LVC Member

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    Lmao right got to love this car smdh


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