1990 Century Stalling and starting problems

Hello,
I am having a few problems with my 1990 century. The first problem is when you try to start the car, it cranks for a good 10 seconds then will start. once it's started it then idles very low. I believe it should idle a little higher while warming up. It also will stalls when you come to a stop, or it will jerk forward slight at a stop. Also when you are driving, it seems to either loose spark or stops getting gas. Am not sure how to tell the difference on the last problem, Any help would be appreciated.
Thanks
Cosmo :banghead:

hey i dont know if it will help much but i had the same problems with mine it turned out to be a lose vacume hose id go ahead and look into that just check all your hoses and make sure theyre all pluged in all the way