disturbing, but thanks... I think I gave Daniboy a hand to do the swap on his rolla. He did the knock sensor side of things, so will have to check with him what he did. I've been thinking about running the older sensor also, I've got it, just need to wire it in. you just snip the plug off the two wires you have there and only connect the black wire the other wire just tape it up in the loom not connected to anything, it can stay there incase for some reason later down the track you need another wire there, a couple of helpfull threads....just remembering celica pinouts are slightly different also. but my wire was black.......:) http://www.newcelica.org/forums/showthread.php?t=118117 http://www.newcelica.org/forums/showthread.php?t=205701 cheers guys, that's awesome, will take a look tomorrow and hopefully get the engine loom all connected again.