My 2003 TD6 has suddenly started to refuse to idle. It runs OK at just over 1k revs but let it run at normal tickover it stops within a few seconds. The fuel pressure checks OK on a Hawkeye, it only drops after the engine stops. The injectors were serviced about 3 months ago the HP pump pressure release valve O rings were replaced at the same time and a new intermediate fuel pump has been fitted. After the engine has stopped I have to press the accelerator to the floor to restart it. Then I get a repeat of the engine stopping again. Any info or suggestions will be very welcome. Incidently no fault codes are shown.