Why does my 1999 cadillac devills acclerates high without pushing the gas pedal?

Look under the hood. you should find a part under there with two metal thin lines connected to it so that when you push the gas pedal, that part moves up, when released, it should go back down, have someone press the gas pedal and look for it right on top of the engine. is there something blocking it? wiring harness, etc.?

It,s either not getting enough gas or not enough air. Check has and air filters.

press and hold start button without pressing brake pedal. do not release until all lights come on and go off except SES light. now press gas pedal three times in five seconds. turn off ignition.press brake pedal and start vehicle. thats it

There has to be a story about that situation

Share it with us ---the long version & what possibly
could we do for you ,IF --you never work on your
own cars,if that is the case

The fuel pressure and fuel system needs to be inspected.
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I suggest you few helk links.Click the link below and follow its troubleshooting procedure:------------------Pushing on the gas pedal, but the car slows down? Gas pedal to the floor and the car slows down? http://technoanswers.blogspot.in/2012/02/pushing-on-gas-pedal-but-car-slows-down.html
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Car dies when gas pedal is pressed? http://schematicsdiagram.blogspot.com/2011/12/car-dies-when-gas-pedal-is-pressed.html
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Car won't start without hitting the gas pedal? http://schematicsdiagram.blogspot.com/2011/12/car-wont-start-without-hitting-gas.html
-------------Car only starts when gas pedal is pressed? http://technoanswers.blogspot.com/2012/01/car-only-starts-when-gas-pedal-is.html
----------1999 Ford F-150 Idles rough and quits when gas pedal is pressed less? http://technoanswers.blogspot.in/2012/01/1999-ford-f-150-idles-rough-and-quits.html
----------Delay starting on Toyota Prius? http://schematicsdiagram.blogspot.in/2012/02/delay-starting-on-toyota-prius.html

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These will help.
Thanks.

Not without testing ? Your best bet , take it to a qualified repair shop.

shut the car off and look at the throttle body, have someone step on the gas pedal if the throttle body does not open up then the cable from the pedle to the throttle popped off or broke

For this problem, i suggest you to go through this help links.Click the link below to go through the troubleshooting procedure :----Car Idles rough and quits when gas pedal is pressed less? http://technoanswers.blogspot.in/2012/01/1999-ford-f-150-idles-rough-and-quits.html-----------Car only starts when gas pedal is pressed? http://technoanswers.blogspot.com/2012/01/car-only-starts-when-gas-pedal-is.html
-----------Car won't start without hitting the gas pedal? http://schematicsdiagram.blogspot.com/2011/12/car-wont-start-without-hitting-gas.html
---------Car dies when gas pedal is pressed? http://schematicsdiagram.blogspot.com/2011/12/car-dies-when-gas-pedal-is-pressed.html
------------Pushing on the gas pedal, but the car slows down? Gas pedal to the floor and the car slows down? http://technoanswers.blogspot.in/2012/02/pushing-on-gas-pedal-but-car-slows-down.html
-----------This will help.Thanks.

abs module may be bad if brakes are being applied or the pump is oscillating without pressing the brake pedal.

fords/international have pad pedal position/throttle position sensors that go bad and you can replace the sensor or the entire pedal but does anyone know what the other sensor is underneath the tps. an accelerator switch??