Chevrolet: 87 Chevy Beretta 2.0 Liter, chevy beretta, vacuum leak

Question
My Beretta is stalling out after it's been drove around for about 30 min, so the engine is nice and warm, but eventually the car stalls. You can start it right back up but when you put it in gear it stalls. Then if you let it sit for a while you can start it up again, put it gear and it's fine for a little while and does the same thing. I've been looking for a vacuum leak but it's hard to tell where it could be comming from, or even if I have one at all. Also I don't have and exact idea of where all the vacuum lines are supposed to run to. Could it be anything other than vacuum? Please Help.

Answer
Hi Bob, sounds like your lockup torque is staying engadged. To test it just unplug it from the transmission and see if the problem is still there. The plug is located on the front of the transmission close to where the transmission and engine bolt together, its a square plug.