iscv lives inder the throttle body on the inlet manifold (u cant see it from the top) b4 changin it deffo clean it as there 80 squid! id also jus check the tps is plugged in...its the lil black sensor on the throttle body's right. and check the maf is plugged in... its joined to the air box...

to change the iscv is a one hand job.. reach along the under of the inlet manifold and unclip wires then with a tiny ratchet and an 8mm bit undo the 2 retaining bolts. to refit reverse process. hth