1989 Buick Century Car idles high

1989 BUICK CENTURY
81,000 MILES • 4 CYL • FWD • AUTOMATIC
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I recently discovered my car has been burning oil and leaking coolant. We filled up the oil & coolant and have been keeping an eye out on it. Not even a week after discovering the above two, the car started to idle high. When I drive it, it accelerates and is increasingly harder to make stops. The car seems to drive itself. Once in park, it makes a roaring sound and the car shakes a bit.
We found codes 42, 34, and 21. My step-dad is very sure we can fix it here at home, but I am cautious and want to bring it into a shop. I was wondering if anyone has any suggestions as to what is happening or where to start.
Also, if you could give a good picture of how the Throttle Position sensor fits back into the throttle body that would be great.
Thanks in advance.
Apr 2, 2009 at 8:14 PM
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