hub_01_69

i recently had a new 22re engine installed in my 91 4x4 auto...and now it wants to idle rough...more so in gear than in neutral or park...and you sometimes have to let it turn over several times before it fires up and a little white smoke puffs out for like a second then quits...but if it fires right up theres no smoke...does this sound like a fuel adjustment problem? any helpful responses are appreciated
THANKS
Josh