The oil at the ECT connector is from the distributor, either the O'ring or seal inside is bad allowing oil to leak down.
High idling speed are due to vacuum leakages, idling speed adjustment out of specs or a malfunction of the IAC.
You mentioned taking off the intake manifold cover, up to which portion was removed, complete manifold?
Was the throttle body and IAC removed?
Was any coolant hoses disconnected?
Sunday, December 23rd, 2012 AT 9:02 PM