I had this problem a couple of years ago - it was the sender at fault - replaced it then fine for a couple of years - it has just started happening again - although a couple of long journeys seem to have sorted it. I was told not to worry as on my Ford engine it is unlikely to be anything wrong. It just seems strange that the pressure shown seems to bear no resemblance to what the engine is doing. But HEY! - they`re Morgans!
