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Thread: need some help with my 1994 Deville 4.9L v8

  1. #1
    Cadillac210 is offline Cadillac Owners Member
    Automobile(s): 1994 Cadillac Deville
    Join Date
    Sep 2011
    Age
    34
    Posts
    1

    Question need some help with my 1994 Deville 4.9L v8

    Car sputters when i push on the gas pedal and shuts off. It turns right back on when i turn the key. Only happens sometimes. Has been starting to get worse over the course of a month. Changed the plugs about a month ago, gas is at good level. (When it turns off the gas gauge goes low, and goes up to its level after that.) What could it be?
    (Also the car backfired on me on way to work when i pressed the gas at 53mph.??)

    Last owner used regular unleaded gasoline. I've been using plus instead of supreme. It was working good... owner since January 2011. 85,3## on odometer

    Last edited by Cadillac210; 09-06-11 at 03:25 PM.

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  3. #2
    aeronca36606 is offline Cadillac Owners Enthusiast
    Automobile(s): 85 Coupe Deville 4.1 V8 & 4.3 V6 Deisel & 1970 Eldorado
    Join Date
    Sep 2005
    Location
    East Tennessee
    Posts
    773

    Re: need some help with my 1994 Cadillac Deville 4.9L v8

    Check the Fuel Pressure Regulator. Make sure that it is giving the correct pressures. Also remove the vacuum hose from the regulator and check for the presence of fuel. There should be none in the vacuum hose. If there is, Then the Fuel Pressure Regulator Diaphragm has failed.

  4. #3
    Bluezero is offline Cadillac Owners Member
    Automobile(s): 1992 Eldorado
    Join Date
    Aug 2011
    Posts
    1

    Re: need some help with my 1994 Cadillac Deville 4.9L v8

    Hey did you ever find out what it was? Seems simple but the same thing happened to me, it turned out to be a clogged fuel filter. Fixed her right up.

  5. #4
    Cadillac12 is offline Cadillac Owners Member
    Automobile(s): 94 4.9 Deville 245k
    Join Date
    Mar 2014
    Location
    none
    Age
    77
    Posts
    2

    Re: need some help with my 1994 Cadillac Deville 4.9L v8

    It could be the a Intermitt MAP sensor.Did you check your codes?

    Good morning. Your CF account is activated. Please update your profile to show proper age, location, car driven and time zone.

  6. #5
    carnut is offline Cadillac Owners Master
    Automobile(s): 1999 BMW 740 Il. 2005 Jag XK8, 1988 Mercedes Benz 300 SE
    Join Date
    Feb 2003
    Location
    california
    Age
    69
    Posts
    6,688

    Re: need some help with my 1994 Cadillac Deville 4.9L v8

    That was last posted almost 3 years ago!!!! Could be dead by now!


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