Chances are you don't have the same problem as me, but just in case...
My 89 ford tempo was stalling whenever i'd put it into reverse. I parallel park and have to Drive/Reverse frequently to get out of my parking space. I found that whenever I moved it to reverse it had a great chance of stalling, but it'd never stall when moving between any other gears.
A couple weeks later my ignition failed, and if I turned my key it'd start.. and as soon as I let go it would kill the engine. I got my ignition replaced, and I did not experience any more stalling on reverse. I don't know how the 2 were related, but that's just my experience.