[BNaylor]

You have one of three possible problems.

If stalling is only at low rpms or around idle possible defective idle air controller or just dirty. Try cleaning the IAC with carb or throttle body cleaner. Also, clean the seat where it mounts to the throttle body.

Second, it coud be an ignition related problem. So far maybe symptoms of a flaky crank position sensor (CKPS).

Third possibiity is a fuel delivery problem (not fuel injector). Check the fuel pressure at the Schader valve located at front fuel injector rail to see if in specs. Also, replacing the fuel filter won't hurt.