My 51 plate Clio is suffering from cold start problems. The coil light remains on continuously. I've checked the plugs and there all fine, wiggled connections, cleaned connection etc. Once she's started she'll be fine for the rest of the day, drives like a dream. If I leave her for more than 3 hours she plays up. I have noticed if I pump the priming bulb while someone cranks she starts fine, any ideas?