my 2005 sebring....mechanic says its the oil pump...but i believe its the low rpms...the oil light dissappears when i hit over 1k rpms....just wondering what could be the problem...lack of power and low idle and i change two o2 senors ....help please and any suggestions please.

 

Most likely it's the sending unit for the oil pressure. Replace that first. If that doesn't solve the problem, then you might need to tear into the engine, but the sending unit is a cheap and easy repair that should be suspected first.
The idle rpm's are governed by the engine computer. You can't adjust it.

 

i change that also...its just a rpm problem...it goes done and down. it doesnt have a start up problem but its does drop low

 

Only other part involved in the idle speed is the idle air control motor. If yours isn't operating properly it should generate a fault code.