Where is the Knock sensor on the LSJ, is it the little one under the closed end of the fuel rail, that looks like a MAP sensor?

 

Right above the starter solenoid, a black round thing with a black wire. To the left of the crank sensor.

 

Ok. What is the other sensor that I'm talking about then... it looks just like a map sensor to me, its 3 wire, hanging off the bracket for the coolant overflow hard line, just under the end of the fuel rail. Any idea?

 

u are correct it is the map sensor..and rears iat2's...

 

baro sensor

 

Not that one, that one is in the mainfold, by #1 piston. This is on the other end, over the trans. Looks like it, but its out in the air.

What does it measure? I mean, I know what baro is, but what does the car use it for?

 

well, not 100% sure....but I would think it uses it as a reference for the MAP sensor. Since the MAP sensors in the car are under pressure from the supercharger (like wot stuff). Make sure everything is working right.