If this is a real question (it is a big car) I would say look to your fuel system. Lack of sufficient fuel supply makes for sluggish acceleration. If it idles well but dies when you accelerate check the fuel pump and fuel line/injector pressure regulator and vacuum lines controlling the pressure regulator. If you get an autoparts store to put the OBDI or OBDII code reader you might see a "lean" condition code come up.
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If this is a real question (it is a big car) I would say look to your fuel system. Lack of sufficient fuel supply makes for sluggish acceleration. If it idles well but dies when you accelerate check the fuel pump and fuel line/injector pressure regulator and vacuum lines controlling the pressure regulator. If you get an autoparts store to put the OBDI or OBDII code reader you might see a "lean" condition code come up.