1998 Subaru Forester stalling while driving

Hi himile98Forester, Welcome to 2carpros and TY for the donation

Do you have a check engine light?

Next time it stalls and refuses to start do below immediately don't wait for nothing to determine if its a fuel or spark issue and comeback with some results we start here

Get a helper disconnect a sparkplug wire or 2 and ground it to the engine atleast 3/16 away from ground-have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, If you can hear the fuel pump come On- check the fuel pressure with a fuel pressure tester designed for your fuel system to rule out the fuel filter/fuel pick-up strainer/fuel pump/pressure regulator and also listen to the injector/s are they pulsing or hook up a noid light and see if it flashing, If you don't hear the fuel pump, check the fuel pump fuse and fuel pump relay-Depends on what type ignition system is yours, No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs, coil's resistances, distributor pick-up coil, ignition control module, camshaft and crankshaft position sensors and computer Note: If it doesn't apply to your vehicle disregard it meaning if it doesn't come with one ignore it and continue testing

Mechanic tested the fuel pressure and said its okay then there's nothing wrong with the fuel pump and its in the fuel tank -for the noid its obviously the injectors are doing its job.

Could be the ignitor, camshaft and camshaft sensors heating up and causing it to include the ignition switch and computer