how can i fix my corsa 1.4i (1994)?

my corsa starts first time every time, but when cold the sports mode icon on instrument pannel flashes and car wont pull away without using alot of revs, i then have to drive it manualy until it has warmed up, then i have to switch off engine completely and re,start, the warning light goes off and no problem, it works as it should, i sometimes have to switch off and re,start two or three times before it works, ANY ADVICE PLEASE ?