Hi john, and coast. Thanks for the responses. I did write it rather quickly, and perhaps not clear enough. Ok when I start the day, I get in (and you can hear the suspension change with my weight), start engine etc and off I go.. I get to my first pick up point, and 3 people get in the back. Obviously the back susp sinks with the weight. It normally raises itself back to ride height within seconds. But it isn't raising at all. So obviously it's not able to drive in that state. However... if I turn the engine off, and remove the key.. it then raises back to normal ride height (with the added weight). So basically everytime I pick people up, I have to stop the engine, remove key, then restart. Hope that makes it a bit clearer. And you have the answer. : )