I'd been thinking for a while my S16 just didn't seem to be going as well as before, wasn't sure if I had just gotten used to the performance.....
Yesterday I decided to see if I could see any problems with obvious things like vacuum hoses. I found a crankcase breather hose wasn't 100% attached so fixed that (not expecting any change). I then noticed what I thought was a crack in the rubber for a hose. Decided to trace where it went, and found what is shown in the pic!
The vacuum hose connects from the throttle body to a little device on the drivers side, which has some wires running to the injector rail, and another pipe running off somewhere else (disapears behind the power steering resevior). I don't know what it does, but reconnecting with a piece of bodgied up hose sure makes a difference performance wise!!!! I'm suspecting the pipe had a crack in it for quite a while before it completely snapped off.
The car is heaps more responsive now, and pulls a hell of a lot better in 2nd and 3rd gear. Much nicer to drive
Thought it might be worth mentioning for other S16 owners out there who may have a simmilar problem.