00 DTS Falls Flat on Face
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Northstar Engines and System Technical Discussion Discussion, 00 DTS Falls Flat on Face in Cadillac Engine Technical Discussion; My 00 DTS has been doing this for the last few weeks that I've had it. It started out very ...
  1. #1
    Aurora By Olds is offline Cadillac Owners Fanatic
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    00 DTS Falls Flat on Face

    My 00 DTS has been doing this for the last few weeks that I've had it. It started out very intermittent, but has gotten worse and worse. See YouTube vid below:



    This only happens when the throttle comes off of idle (can happen in P, D, at 10, 20, 50, 90+ MPH) and it totally falls flat on its face and stumbles until I pull my foot off. If I immediately pull my foot off and jam it back on, it's fine. Just replaced the Fuel Filter and from what I can guess the FP is ok (36-46psi) because I don't know the actual specs off hand. The pump and pressure do seem responsive enough to not be the problem.
    Once the stumble has passed, the call will pull hard and ever all the way to 130 or until I let off.
    It almost seems more like an electrical problem than a fuel problem at this point, but I don't really know where to start. Any ideas?

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  3. #2
    dkozloski's Avatar
    dkozloski is offline Cadillac Owners 10000+ Posts
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    Re: 00 DTS Falls Flat on Face

    Pull the codes.
    Don't mess with Binky Bear!


  4. #3
    Aurora By Olds is offline Cadillac Owners Fanatic
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    Re: 00 DTS Falls Flat on Face

    Quote Originally Posted by dkozloski View Post
    Pull the codes.
    Forgot to mention....there are none. :-(

  5. #4
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: 00 DTS Falls Flat on Face

    It does seem more electrical than fuel, but beyond that, I can't think of anything.

  6. #5
    STSj90 is offline Cadillac Owners Fanatic
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    Re: 00 DTS Falls Flat on Face

    Is she breathing good? Is there anything in the way of her nose?Anything obstructing?(intake)

    What kind of fuel is she running on? maybe you ran into some bad gas?

    Just throwing some idea's around...

  7. #6
    codewize's Avatar
    codewize is offline Cadillac Owners Master
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    Re: 00 DTS Falls Flat on Face

    I think what you may be seeing in that video is it hitting the rev limiter at 4k. Just a thought.
    Ownership:
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  8. #7
    STSj90 is offline Cadillac Owners Fanatic
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    Re: 00 DTS Falls Flat on Face

    Quote Originally Posted by codewize View Post
    I think what you may be seeing in that video is it hitting the rev limiter at 4k. Just a thought.

    Doesnt sound like 4000RPM to me. Sounds like its bogging when you give it a sudden dose of throttle. Then you lift up alittle and it revs on up.

  9. #8
    codewize's Avatar
    codewize is offline Cadillac Owners Master
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    Re: 00 DTS Falls Flat on Face

    OK, Just wondering.

    For some reason 4k never sounded like 4k to me on the N*. It was just an idea.

    Quote Originally Posted by STSj90 View Post
    Doesnt sound like 4000RPM to me. Sounds like its bogging when you give it a sudden dose of throttle. Then you lift up alittle and it revs on up.
    Ownership:
    91 d'Elegance 350
    02 DTS
    01 DTS:
    Custom installed Volant CAI
    Custom PCM
    Body color engine components
    Cruiser Alloy wheels
    EBC brakes and rotors
    Eibach springs
    Corsa exhaust
    Sportwing Spoiler
    Semi-custom interior
    Custom quad Hi-Beams
    Future Plans: More interior work.


    Memberships:
    National and regional Cadillac & LaSalle Club
    Proud Volunteer - Northstar Tuning Project
    Guinness World Records - Largest Cadillac Parade

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  10. #9
    chubbyranger is offline Cadillac Owners Connoisseur
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    Re: 00 DTS Falls Flat on Face

    Bad spot in the TPS?

  11. #10
    Aurora By Olds is offline Cadillac Owners Fanatic
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    Re: 00 DTS Falls Flat on Face

    Quote Originally Posted by chubbyranger View Post
    Bad spot in the TPS?
    TPS was my first thought, but it's intermittent, and only happens when coming off of idle. Get right back on, and it goes like a raped ape.
    Its breathing fine, no leaks or obstructions. And again, its intermittent.
    Definitly not hitting the rev limiter, not even close.

    Still no codes, except for the notorious B0429....

    Maybe I will take it out tomorrow and show it whose boss for a few hours and see if anything pops up other than burnt rubber....

  12. #11
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: 00 DTS Falls Flat on Face

    You know, now that you mention it, I recall our old Guru saying that a bad TPS would act like a bad accelerator pump on a carburetor. Exactly what you are describing.

  13. #12
    codewize's Avatar
    codewize is offline Cadillac Owners Master
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    Re: 00 DTS Falls Flat on Face

    You're right, I had that on my 89. I guess I wasn't thinking about that.
    Ownership:
    91 d'Elegance 350
    02 DTS
    01 DTS:
    Custom installed Volant CAI
    Custom PCM
    Body color engine components
    Cruiser Alloy wheels
    EBC brakes and rotors
    Eibach springs
    Corsa exhaust
    Sportwing Spoiler
    Semi-custom interior
    Custom quad Hi-Beams
    Future Plans: More interior work.


    Memberships:
    National and regional Cadillac & LaSalle Club
    Proud Volunteer - Northstar Tuning Project
    Guinness World Records - Largest Cadillac Parade

    ----------------------------

  14. #13
    Aurora By Olds is offline Cadillac Owners Fanatic
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    Re: 00 DTS Falls Flat on Face

    Quote Originally Posted by Ranger View Post
    You know, now that you mention it, I recall our old Guru saying that a bad TPS would act like a bad accelerator pump on a carburetor. Exactly what you are describing.
    Guess it's possible. I'll see if I have time to check into one today. if I remember from the last time I had to buy one they're not that much.
    It does actually make sense, though. Idle (or close to it) signal to the PCM from the TPS with a WOT would do just what it's doing...

  15. #14
    chazglenn3's Avatar
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    Re: 00 DTS Falls Flat on Face

    Okay...I'm confused. If the redline is up in the 6K range, why would the car hit the rev limiter at 4K???

  16. #15
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: 00 DTS Falls Flat on Face

    Yes.

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