1995 Mustang GT stalls and won't start

[minifridge1138]

I replaced the ignition coil and the car ran fine for a while.
This morning on the way to work it started acting like it was going to stall, so i drove back home and got my other car.
It didn't actually stall, but i decided not to chance it.

I'm going to replace the fuel filter today.

The plugs and wires are new.
The distributor is new.
The cap and rotor are not new, but they look fine.

I'll drive today after replacing the fuel filter and see if there are any issues. I may do the ignition module next. Is it hard to do?

Thanks!