dj_steve

hello all,
have had my impreza for a few months now and i have noticed what i would class as a problem with cold starting on it, sometimes if cars been sat a bit (usually overnight) it will fire up but seem to splutter for about 5 seconds before jumping to ~2k rpm for a couple mins. also if i then stall it it very likely wont fire back up without me flooring the throttle, any ideas if this could be ecu problem as i seem to recall a similar issue on my old 2l rx hawkeye impreza which dealer solved with a software update