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Thread: HELP!! 1993 DeVille Tune Up inquiry

  1. #1
    Join Date
    Sep 2004

    HELP!! 1993 DeVille Tune Up inquiry

    I recently purchased a 1993 De Ville with a 4.9. I am not certain when the motor should be tuned up. I have 80,000 miles on it. I know that the Northstar doesn't require one until 100,000. Does anyone have this information?

    Last edited by mrjamies; 09-07-04 at 12:51 AM. Reason: refinement

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  3. #2
    Join Date
    Mar 2003
    Hollywood, CA

    Re: HELP!! 1993 DeVille Tune Up inquiry

    Firstly, when you purchased the 1993, did you ask the person you bought it from when it was last tuned up. And knowing it has 80k on it I wouldnt do any tuning up until around 120k, because as long as the engine is running strong, and nothing is leaking, it should go to about 120-150k without any problems, good luck.

  4. #3
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with DTS floor shift)
    Join Date
    Jun 2004
    Woodstock Ill.

    Re: HELP!! 1993 DeVille Tune Up inquiry

    If you don't know when it was done, drain and refille the coolant. Leave the "tune up" alone. My '92 (4.9) had 125K on it when I traded it and had original plugs and wires and ran great.

  5. #4
    Ralph's Avatar
    Ralph is offline Cadillac Owners 10000+ Posts
    Automobile(s): Cadillac
    Join Date
    Mar 2003
    Saskatchewan, Canada

    Re: HELP!! 1993 DeVille Tune Up inquiry

    Concerning spark plugs, from what I recall, 1992 was the first year for platinum plugs good for 100,000 or so. Personally, I would never wait that long to do plugs, but to each their own.


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