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Thread: 95 Deville 4.9 electrical problems?

  1. #1
    BullRidnRenegade is offline Cadillac Owners Member
    Automobile(s): 1995 Sedan Deville
    Join Date
    Aug 2014

    95 Deville 4.9 electrical problems?

    Hello all, i'm new here on the forums. I've got a 95 Deville with a 4.9 with 160,000 on the clock. I'm a professional bull rider and the car is my travelling rig. Over the past few months its developed some sort of electrical issue. It fires up perfectly every time, but when I 1st start it up and start driving, it sputters and bucks and cuts out. It doesnt die completely, but it seems like its only running on a few cylinders. After it warms up for about 10 minutes it is clears up and runs great. What has me thinking its an electrical issue is the same thing happens periodically if I turn on the headlights, or roll down a window while driving. It seems that the extra draw of current from any electronic accessory cuts power from the engine and makes it start cutting out. as soon as that accessory stops drawing current, the car smooths out again. It used to do it occasionally, but lately it has been getting worse. This car goes all over the country, so I want to figure this out before it leaves me stranded. It isnt throwing any codes. Any ideas?

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  3. #2
    amunderdog is offline Cadillac Owners Connoisseur
    Automobile(s): 1994 SLS x 2 ---- 1993 Eldorado Sport ----- 1994 Deville 4.9
    Join Date
    Feb 2010
    Sunbright, TN

    Re: 95 Deville 4.9 electrical problems?

    Try this so you can monitor the charging volts and some other things

  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: 95 Deville 4.9 electrical problems?

    If voltage is OK, check your fuel pressure.

  5. #4
    brougham is offline Cadillac Owners Master
    Automobile(s): 1991 Cadillac Brougham D'Elegance 5.7 Litre, 1994 DeVille
    Join Date
    Jun 2003

    Re: 95 Deville 4.9 electrical problems?

    Did you check for codes? It's probably a sensor somewhere that isn't working properly.


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