All. After having gathered together all of the bits ready to cure my slight overheating problem (new thermostat, self-bleed kit, hoses etc) I cam to start my DMC this morning. Although it started first time, pressing the accelerator did not increase the engine revs, instead it made it sound like it was going to stall, with a drop in revs? With my foot off the accelerator it immediately started idling normally again. I restarted it several time but with the same scenario. After ringing the garage to tell them I would be late I restarted it (for about the 6th time) and it began to run much better. There is still a definite hesitation between pressing the accelerator and getting a normal response. Any suggestions? Hopefully it is something I can check/fix/replace in time to get to Shuttleworth?. John Chapelhow DOC 19 : `Boeing' 0737 (temporarily grounded)