s14 keeps chugging and dying. someone help me please.

[rainier]

well yeah on my way to san diego from irvine today my car died about 4 times on me and it was struggling half of the way there. whenever i drive a long while it always seems to start chugging really violently and then i have to let in the clutch so i dont fuck anything up. i pull off to the side of the road and wait a couple minutes and go back on the road.

i dont know what the hell is the problem. a week ago i changed out my water pump since it was leaking fluid. and when today when i got to san diego i saw some coolant leaking from somewhere too. it isnt from a loose hose or anything. its towards the front of my motor where the radiator hoses go into my engine. if someone fixes this problem for me. ill give you 100 bucks. seriously.