hesitation

Hi.My 1994 BMW 318i hesitates when the engine is cold.The hesitation disappears when the engine reaches it's normal operating temperature.I've replaced fuel pump,spark plugs,air filter,fuel filter.what could be the problem?
Thanks.

Maybe when you go to get your next fill up try some fuel injection cleaner and some gas line dryer. But don't do them at the same time. Do one first, then on the next fill, do the other. Hope that helps.

Ive had ben advised by a respected machanic that when cleaning the injectors to not place the stuff into the tank.. It's designed to break up the gum right? well then it breaks up the gum in the tank adn send it trought the line to the injectors again. instead pop the hood and add it from the line there. this will send the gas and cleaner right to where you need it, with out the jun from the tank as well.