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Cadillac DTS Forum - 2006 through 2012 Discussion, Weird problem in Past Cadillac Vehicle Discussion; D on, You mentioned in Post #64 that you “ went to the dealer today. They said they scanned it ...
  1. #76
    jazoo is offline Cadillac Owners Fanatic
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    Re: Weird problem

    Don, You mentioned in Post #64 that you went to the dealer today. They said they scanned it and found nothing that would cause this problem. Then in Post #71, you said well I think we got somewhere today. They did more diagnostics and hooked it up to the machine……... So is this continuation of Post #64 or is this a different dealership? I hope you got it fixed finally.

    Don, couple of questions; 1) did your scanner or on-board diagnostics (OBD II) computer pull any codes at all?, 2) Shouldn’t you be looking @ replacing all eight coils instead of just two (I don’t remember that you mentioned the odometer readings on your vehicle)?

  2. #77
    Dadillac's Avatar
    Dadillac is offline Cadillac Owners Connoisseur
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    Re: Weird problem

    First diagnosis was with the Tech2 scanner. There was no fault codes using the Tech2. So they went to general diagnostics and started with fuel pressure. After that there was some other machine that I guess graphs ignition. Don't ask me what it is because I haven't seen it. But the tech said it was graphing all crazy with a misfire. So that's when he changed the coil and it quieted the graph down. My car has 65,000 miles on it and I am not yet ready to replace 8 coils at $50 a pop just yet. If they were half that I would do it. Also my scanner showed no codes. It only reads emission codes that would trip the CEL. And the CEL never came on so my scanner said all things were good. Oh and it was the same dealer.

    Don

  3. #78
    Superjim's Avatar
    Superjim is offline Cadillac Owners Connoisseur
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    Re: Weird problem

    I have a little over 130,000 on mine and I guess I have been lucky.
    Except for a half case leak that was fixed under warranty it has been pretty much trouble free.
    Other than that, it has never had a wrench on the engine or transmission.
    No ignition problems or fuel problems ... at least not yet.
    It still has the original plugs in it... I probably need to change them...

    Jim

  4. #79
    RicktheRealtor is offline Cadillac Owners Fanatic
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    Re: Weird problem

    Quote Originally Posted by Superjim View Post
    I have a little over 130,000 on mine and I guess I have been lucky.
    Except for a half case leak that was fixed under warranty it has been pretty much trouble free.
    Other than that, it has never had a wrench on the engine or transmission.
    No ignition problems or fuel problems ... at least not yet.
    It still has the original plugs in it... I probably need to change them...

    Jim
    I bet your plugs aren't carbon fouled!
    Superjim likes this.

  5. #80
    Dadillac's Avatar
    Dadillac is offline Cadillac Owners Connoisseur
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    Re: Weird problem

    New coils arrived today and I got them installed. So far so good. I will know in the morning if the issue is 100% gone or not. I am positive it is

    Don
    ronm01 likes this.

  6. #81
    BIGDADDYCADDY07 is offline Cadillac Owners Fanatic
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    Re: Weird problem

    the misfire you had on a scale of 1 to 10 what would you describe it was and was it noticeable when at normal temp???

  7. #82
    Dadillac's Avatar
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    Re: Weird problem

    It varied in intensity. The major symptom was a feeling of the car wanting to drive while my foot was on the brake. Quick misfires in rapid succession. When the engine was fully up to temperature the frequency and intensity died down significantly.

    I drovebto work this morning to a butter smooth engine. Issue is completely gone.

    Don

  8. #83
    BIGDADDYCADDY07 is offline Cadillac Owners Fanatic
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    Re: Weird problem

    nice that what we like to hear enjoy the ride brother

  9. #84
    jazoo is offline Cadillac Owners Fanatic
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    Re: Weird problem

    Quote Originally Posted by Dadillac View Post
    It varied in intensity. The major symptom was a feeling of the car wanting to drive while my foot was on the brake. Quick misfires in rapid succession. When the engine was fully up to temperature the frequency and intensity died down significantly.

    I drovebto work this morning to a butter smooth engine. Issue is completely gone.

    Don
    Congrats!!! Don, I'm so happy for you. Your hard work (& perseverance) is finally paid off.

  10. #85
    HASSAN4477 is offline Cadillac Owners Member
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    Have ur cats checked out or the resonator this could explain y no codes its after all the extra sensitive stuff. Did you clean you're manifold on the inside I foind alot of carbon in mine also try sea foam to clean the carbon from the cylinders

  11. #86
    RicktheRealtor is offline Cadillac Owners Fanatic
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    Re: Weird problem

    Quote Originally Posted by Dadillac View Post
    It varied in intensity. The major symptom was a feeling of the car wanting to drive while my foot was on the brake. Quick misfires in rapid succession. When the engine was fully up to temperature the frequency and intensity died down significantly.

    I drovebto work this morning to a butter smooth engine. Issue is completely gone.

    Don
    Nice to hear. Congrats. BTW, Happy Fourth to all my American friends.

  12. #87
    TulsaVic is online now Cadillac Owners Enthusiast
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    Re: Weird problem

    Quote Originally Posted by Superjim View Post
    I have a little over 130,000 on mine and I guess I have been lucky.
    Except for a half case leak that was fixed under warranty it has been pretty much trouble free.
    Other than that, it has never had a wrench on the engine or transmission.
    No ignition problems or fuel problems ... at least not yet.
    It still has the original plugs in it... I probably need to change them...
    Jim
    Guess this is testament to the belief that the N* was built to be driven hard ....
    Superjim likes this.

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