this can be the temperature "sensor" unit? (not the sender unit to the temp.gauge)... if this sensor is faulty?...the engine management unit may believe your car is cold when its fully warmed up! and over choke with fuel?..after 10 minutes or so...it will start as though theres no problem!...thats what happened to my Honda concerto 1.6...every time i stopped in a petrol station...since they are both Hondas it could be a possibility?........check it out by going to the breakers and getting another unit...cos they are relatively expensive to buy...