i have a 96' 850 turbo with the cd, radio and tape player, i had the same symptoms like perfect AM reception but no FM signal or intermittent.Alsothe antenna is still stuck (doesn't go all the way down).
Now what i did is to add an antenna extension (cable, that i purchase at chekers for $4) and a little clean up on thebase of the antenna.idid it just a fewhours ago,but i've been driving around and theFM signal isclear and strong even when the st is shown. anyways, itworked, for me!!!!