rough when cold

[Tommyg]

My car runs rough when cold. All I've done is a new set of plugs,new fuel pump/hot wire kit and stock chip. Also it sometimes bucks when accelerating mildly during warm ups. Any suggestions? Thanks in advance, Tommy

 

[87gninpa]

though this may not be the problem, try throwing a new fuel filter on along with the new pump. also, check the MAF, sounds like it might be giving you trouble. mine currently is and its doing the same thing. do you have a scantool? if so, what is it reading?