2000 Deville shakes at Idle, No DTC's
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Northstar Engines and System Technical Discussion Discussion, 2000 Deville shakes at Idle, No DTC's in Cadillac Engine Technical Discussion; My car has recently started to run pretty crappy. I have already done the plenum and intake gaskets as well ...
  1. #1
    postman2000's Avatar
    postman2000 is offline Cadillac Owners Fanatic
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    2000 Deville shakes at Idle, No DTC's

    My car has recently started to run pretty crappy. I have already done the plenum and intake gaskets as well as the injector o-rings. I have no codes other than a convertor code which has been there for two years. In the absence of codes, what do you guys think I should check? I appreciate any and all help..Thanks..

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    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: 2000 Deville shakes at Idle, No DTC's

    How old are the plugs? Did you clean the TB? Are all the vacuum hoses tight?

  4. #3
    postman2000's Avatar
    postman2000 is offline Cadillac Owners Fanatic
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    Re: 2000 Deville shakes at Idle, No DTC's

    Yes the vacuum hoses are tight and I cleaned the TB. I did the plugs about 55,000 miles ago and used the AC Delco ones

  5. #4
    Ranger's Avatar
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    Re: 2000 Deville shakes at Idle, No DTC's

    Bad coil maybe?

  6. #5
    postman2000's Avatar
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    Re: 2000 Deville shakes at Idle, No DTC's

    I also cleaned the Idle Air Control valve. I guess I'll be throwing parts at this car too..Even if I take it to a mechanic they gonna do the same thing because theres's no codes to point them in the right direction..I have seen it happen all too much...

  7. #6
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: 2000 Deville shakes at Idle, No DTC's

    You could go to a junk yard and pick up a used ignition cassette cheap and swap them out one at a time to see if that solves the problem.

  8. #7
    postman2000's Avatar
    postman2000 is offline Cadillac Owners Fanatic
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    Re: 2000 Deville shakes at Idle, No DTC's

    Yeah I think that's a good idea.. I just may do that

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