got fed up with it so took it into main stealers (yes i took a large jar of vaseline).
fitter came out,looked about 12 years old,pluged in the diagnostics,
not showing any faults.bit of teeth sucking he then wandered off into workshop and came back with an air line and proceeded to remove exhaust filter and stick the air line into valve block and gave it full pressure.
Guess what suspension dropped to bump stops,he started car and it rose up like a good un,whats that all about??.
according to the 12 year old its a common fix for a common problem just recommended that i change the diaphram.
Another shocker,no charge.
i am defo doing the lottery this week while my lucks in.