s14 overheating issue

[Ikant]

I recently replaced my radiator because it exploded. the car was overheating and im sure the pressure was too much. I replaced the thermostat thinking that might have been the problem, but it wasnt, car kept overheating with new radiator and thermostat. I removed the thermostat and car is still overheating. I am thinking it might be the waterpump, but i was wondering if it could have something to do with the fan. I can drive on the freeway for hours and the guage wont move above "normal", even if the a/c is on. When i drive through town, once it gets warm it overheats when i sit at a light. When i start driving again, temp goes back down. Any ideas? should i replace the water pump? could it be the clutch fan? I bled the system multiple times, im sure it could still be a bleeding issue, but was looking for feedback. I read several other threads but found nothing on the fan issue. thanks.