I have just finished converting my 89 back to fuel injetion.The car starts fine but it runs like it has a big cam and very rich.It does this for about three to four minutes and then smoths out and not running rich at least not compared to what is was.The car does this every time i start it,it does not matter if its cold or hot.I am running an explorer intake, stock injetors,a gms 75mm mass air meter and kirben adjustable regulater set at 40psi.I have installed a new atc sensor and my egr valve is not plugged in to wire harness or vacum.I also have a 255 fuel pump.Any help with this would be greatly appreciated.