Thanks heaps for pointing me in the right direction utevanwgn, I found the wires to this temp sensor were brittle and when I played with it a wire had actually broken, fixed it up and it's running sweet. As I said in the first post it would be something I have played with.
I had actually extend the ignition module harness to shift it out the way and thought I had crossed some wires but had checked that about twenty times so needed to check elsewhere.

Thanks again.