95 olds aurora Idle problems

Hello i have a 95 olds aurora 4.0 that will not idle below 3000 rpms this just started today any ideas of what may have happend and how to fix
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Probably not. The pressure sender is often the culprit. They cost about $25; buy only ACDelco. It is a black cylinder about the size of a roll of quarters located near the oil filter.
If you have to ask where the oil pump is, do not consider replacing it yourself.
Hope this helps.
Les