OK after a good run, if I kill the engine (for example pulling up at a petrol pump)then soon after start the engine again....it take's about 5 second's of starter-motor effort to get the thing going. Then...a stench of petrol AND (I might be imagining it) a stench of egg. I'm thinking the cat????? I'm not sure about the EGG though. When it does get going it's over revving in iddle at about 1.5k rev's (even though the engine's warm), or it's looking like it might die (about .5k rev's, (although it's never died. When the rev's are low it's like I've put a STUPID exhaust on and it's gurggling. Sound's MEAN! This only last's a few second's (over rev or under) It does this no matter how much you do or don't press on the "gass" peddle AND, it doesn't do it every time, in fact only three time's so far! Please hekp I'm embarassed pulling away from the pump! Any idea's????????