I have a 1.1 clio and sometimes when I go below 1000 revs this warning light appears and the engine cuts out. I restart the engine stop at a junction and when I get to below 1000 revs engine cuts out again. When I start the engine the revs go up and down without my foot touching the accelerator. I need a lot more revs to pull away and light goes off when I get into 3rd gear. Light only comes up about once a week and isn't on very long but is very annoying as engine just cuts out. Does anyone know what this could be?