Wow. Thanks guys! Is it hard to remove the valve cover? Never done that before. Also, after I took off my sensor wire and reconnected it (wasn't exactly sure how it came off with the 1,2,3,4 numbers positioning), the car is not idling at 700 RPM when cool and 500 RPM when warm. It's just idling at 500 RPM no matter what. Did I stick the wire back on in the wrong direction? Does it matter? Would this possibly indicate another problem?