im trying desperately to find out whats causing this..
ill try to describe the problem a little bit..
when i start the car for the first time of the day (very cold).. it chokes VERY slowly, but starts VERY QUICKLY after only about one second..

but after driving it and parking it (few hours later when its warmer in the day, upon returning its not so happy to start. at this time it chokes at its proper speed, but refuses to go on so easily. after letting it choke for a while, it MAY go on.. but then black smoke comes out the exhaust, then its fine. if it doesnt go on first try, it most likely goes on second try.. but still smoke, then its fine. BUT if i shut the car down, and immediately start it again, it goes on perfect.
i have only tried to change spark plugs
whats the most likely cause of this? should i replace the starter motor? could any fuel leaks cause this? ive fixed the only fuel leak that was spooted..
EDIT: ok, the problem has always been the leaky injector.. replaced both of them to make sure, and it fixed it.. :)