i bought a 1987 allante as my first car and am having trouble please help
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Cadillac Allante Forum Discussion, i bought a 1987 allante as my first car and am having trouble please help in Past Cadillac Vehicle Discussion; well first of all i bought a 1987 allante whick i love and have wanted one since i was 3 ...
  1. #1
    mbl_rl's Avatar
    mbl_rl is offline Cadillac Owners Fanatic
    Automobile(s): 2013 Cadillac XTS V-6 Sedan
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    Post i bought a 1987 allante as my first car and am having trouble please help

    well first of all i bought a 1987 allante whick i love and have wanted one since i was 3 so getting it for my first car was to cool for words the thing is is that it starts and runs but needs a new alternator which i am getting the thing is though when i start it it runs then acts like it wants to cutt out the control system fault light illumantes and then the driver info center starts saying to service the electrical system soon see owners manual the thing i was wondering is that if it is a major problem or its just the alternator then when i put it in drive gears like drive reverse etc the digitil speedometor starts jumping to speeds and i have my foot on the break and the car is not moving but it will jump to speeds like 21 38 46 48 54 then it will lower the speeds like 34 28 18 12 10 and it just keeps doin these over and over so please any help please help me i dont have an excisive amount of money to spend on this car so any suggestions you have would be greatley apriciatted by a young cadillac owner i really love this car alot
    i wont ever own anything but a cadillac for the reast of my life

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  3. #2
    carnut is offline Cadillac Owners Master
    Automobile(s): 1988 Allante' (sold), 1984 Eldorado, 84 Sedan DeVille
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    Re: i bought a 1987 allante as my first car and am having trouble please help

    Next thing to buy is a FACTORY! service manual. With the manual you can scan for fault messages in the climate control display and understand the messages displayed. You dont have to be mechanically inclined, just follow the trouble codes and write the fault codes down for your mechanic. If in fact , you need an alternator, please get ONLY a DELCO rebuilt unit listed at 120 amps for an Allante. This alt. puts out 10 more amps than the other Caddy alternators and is specifically for an Allante.

  4. #3
    Allantesource is offline Cadillac Owners Fanatic
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    Re: i bought a 1987 allante as my first car and am having trouble please help

    The symptoms described about the speedometer jumping around with your foot on the brake with the car in gear is usually caused by a bad alternator. The advice above to ONLY buy a Delco replacement is correct. The electrical/electronic systems on Allante's are more sophisticated than other cars.

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