Thanks for that. I thought I had found it last night in the posn described hiding under a hose. I did only find one though and now not sure if it was the CTS or the temp gauge sender. It had the two pin connector with the sliding wire locking mechanism (although like a number of mine this was broken) do they both have this connector or does this prove I had the right one. The problem is when my intermittant fault happens - if you turn the car off it will not start again. When I disconnected the CTS (assuming it was the right one) the car started O.K. Any particular sensor that stops the engine starting if faulting and causes to run rich and rev up on its own. Thanks again David