Originally Posted by Stu @ M Developments
Intermittent is most common.
I dont recall the last one that just broke totally.
Thanks for the swift reply Stu - you'll have to excuse my ignorance when it comes to some of the terms you use.
I'm having a crash-course in engine ECU diagnostics starting off with a Weber Marelli L8 Cossie setup in a car that was never designed to have that setup installed!

Not the best situation as I'm sure you'd agree!
OK - so another sensor to replace then
Any idea on cost of these? I'll get one ordered by a friend who works at Ford.
Cheers,
Andy