Question

Over the past couple of months we have been having an intermittant problem with my car started stalling out while driving.   I have replaced the fuel pump and fuel sender assembly, fuel filter, XBO relay, replaces spark plugs and wires, and put new gasket on manifold. No one can seem to pinpoint the problem. When the car is running it seems to run great for a few days or a couple of weeks, then it starts stalling out again. It just shuts down while I'm driving and won't restart. Sometimes the stalling happens within minutes of starting it up, other times it's after driving it for a while. We are completely stumped and getting increasingly frustrated, not to mention the expense with no resolution of the problem. No matter what we do no one seems to be able to locate what is causing the stalling. Please HELP !!!!!