the car is a 92 lumina z34. i have had lots of work done on it yet it still stalls. usually when it warms up it will stall. at first it was interminent but it has become much more frequent. I have replaced the ignition module, starter, fuel pump, fuel filter, amongs other parts. I think it may be the ECM from what i have read in other forms but i have no idea where it is on this car. I was wondering if anyone can comfirm this as a possible problem. Where is the ECM located and is there a way to test it?

On the back of the intake manifold (near the firewall), down low, there is a 3/8" vacuum line that feeds the power brakes. Most of the time, this line gets soft from PCV oil collecting in it when the engine is off, and the line becomes soft, splits, and becomes a huge vacuum leak that makes the engine stall.

I hope the vacuum line Supergumby tells about is your problem. My son had a 93 Z34 that ran great till about 90kmiles. Then it would start dieing after it got warmed up. It would mostly do it as he slowed down to stop or turn a corner. We replaced almost every sensor on the motor. Finally discovered it was the “phantom stalling” problem of the Z34. The fix was a set of injectors that were different than those furnished with the car. They were hard to locate. Had to get them from a dealership. Go to 60degreev6.com and search with the word phantom. Good luck. Someone on that website said you have to enjoy working on cars to own a Z34. I believe it.