Run a compression test and see what the results are, I had a similar problem with my 1g. It was running fine then just stop running. I had 7 bent valves on the intake side and my timing belt was fine. I had a lifter stick up and push a couple valves into the pistons. I'm still not sure how so many got bent unless they were messed up before I got it. only one was hammered but the rest would wobble if I spun them in a drill. Also check for spark. A bad CAS can and will cause your coil pack to only fire on 1 and 4. that also happened to me just recently. Hope this helps or leads you in the right direction.
Randy Constable, 92 Laser AWD, 90 GSX, 91 GVR4 Auto swapped(1078/2k)