'92 Rs 305 TBI DIES!!!!!! PLEASE HELP

Ok I just got this car like 5 days ago and I have replaced the fuel pump and filter. I Had a tune up done and I replaced the breather filter becaus it was taking in some oil. For some reason the car will just die on me; Sometimes after I'v driven it for an hour and others after 5 minutes of driving. After it dies it always gives me trouble but eventualy starts back up I don't know what is wrong. Please help!!!!!

does a check engine light or anything come on when any of this is happening?

how does it die....does it just flat out stop running...does it stop running when your on the gas....when you stopped...just cruising..? What sound does it make...i know its hard to describe a sound in letters but that will give us a little hint...

do a fuel pressure test and a spark test, then go from there.

It usually happens when im idling like at a red light but it also happens when im breaking. I dosn't make a sound the idle just drops out the car dies and the check engn. light comes on. It dosn't give a worning no sputter or anything. Whats wierd is when the car is runnig it works fine no hasitation or anything.

hmmm...mine did that and it was a vacuum leak that went from my map to my tbi unit....check all the vacuum lines and see what condition they are in...

An abrupt, just quits feels like you intentionally shut it off usually points to a ignition/elec problem.

A sputter to death would usually be a air/fule(lack there of) issue.