No Idle Help! Help! Anyone Please!

  I need help with an Eclipse GS '94 that will no idle, but it does run good.   Some say is the O2 sensor.   I just got the car from a friend and he has not clue neither.   I don't know nothing about this type of car so... If any of you guys who are expert in the field can give me a hand I'll will greatly appreciate.   Also if you guys have any idea how much the repair and parts will cost that will help me. 

                                                                                Thanks.

I'll try to help, but this is a strange problem to have without anything said causing it.  First is o2 sensor replacment second is changing the idle using the screw located on the intake manifold.  at least thats where it is on my turbo.  Check your repair manual and I'll check mine for placement.

Dave

I have seen this before but it was on a mustang. Some how one of the caps on a vacuum hose for fuel pump or ,something with the fuel, came off all he had to do was replace it.

Just a thought you might look into.