1995 Toyota Corolla Corolla Won't Run right

What quality of spark do you have? when you test it, the spark should be blue and bright, if it is weak and orange you may have a weak coil.Have you verified fuel pressure with a manual gauge?

The spark was indeed bright. I put new spark plugs in as well. While I did not pressure test the fuel pressure, I did replace the fuel pump, fuel filter and fuel pressure regulator. I did attempt to get codes out of it, and all I get is that there are no codes to be gotten. I can get it started and it will run, for a little while anyhow. Then it goes back and has the same symptoms as before all the work. Could it be a voltage problem which limits fuel via the fuel pump? Generally when it acts up, I can jump it and get it to run. Other than at idle, or at low speeds, it runs well, when it wants to run that is. Thanks!!

Could be a voltage problem.is the alt putting out enough? should be 13+volts at idle

How would I measure that? Can I measure battery voltage to accomplish this? Please let me know. Thanks!!

Use a voltmeter at the battery. measure voltage idling with nothing extra on. then measure with headlights and a/c on.