Driver door hinge, door doesn't stay open
It's possible the spring could be upside down. The spring has a short loop on one end, and longer loop on the other. The squared off end is the end that's supposed to work against the two rollers. Here are a couple of poor photos from my Valiant.
This is the drivers side hinge - rollers on the bottom, short end of spring on the top.
This is the passenger side hinge, rollers and longer end of spring on top.