One of the things that open and close the ports its stuck open it's the one toward the front of the car. My question is, are easy to replace and what kind of prices am I looking at. One more I just converted them too open from the air pump, does the exaughst return line still surve a porpose I noticed the main part runs up into the intake somewhere what is it for?

 

if i remember right, i think the airpump is only there for emmission... correct me if im wrong tho

 

im talking about the line that comes from the main cat other than opening the aux ports what is it for?

 

The split air hose (line the that runs from lower intake to cat) is there to provide exhaust backpressure to open the ports, but mainly to allow the airpump to feed air to the cat. If you are still using the stock cat, you need that line.

Your broken actuator can likely just be repaired. They stick over time, so just remove it and clean it up.

http://www.aaroncake.net/rx-7/6portfix.htm

 

if I take the main cat out do I still need the return exuaghst line?