I would try to use small tack welds all the way around the latch if I had to weld it...but my advice is to hold the fuel door in place, or have someone hold it for you, and then drill two small holes through the hinge and into the body of the car, and screw two small metal screws into place. If the heads of the screws are getting in the way, you can grind them down with a small rotary tool or likewise to where about 1mm is left of the screw, and that should solve your problem.
the fender must be well loosened or removed to get to the hinge bolts
Have someone lift and shake the door while you watch the hinges to see if they are loose. If the hinge pins are worn, the door will sag and make it difficult to close. You also may need to replace the nylon bushing on the door strik pin if there has been too much weight when the door closes. The strike pins can be replaced but if you haven't already done one, you might want to have someone help you or do it for you. It happened to me. If you open the door, lift up and down on the bottom of the door to see if it loose where the door hinge is bolted to the fender. If it loose where it is bolted to the fender, you will need to tighten the bolts. If the nuts are stripped in the fender, take it to the body shop. What was stripped in my door was the nuts inside the fender that the bolts went into. You could just have a stripped bolt. I had the choice of taking off the whole fender to fix it or weld the door hinge tho the fender. I chose to have the body shop weld the hinge (much cheaper). They did a perfect job welding the hinge so the door fit and matched perfect. I bought the car used and the fit was better that when I bought it.
Perry Mason's entire case will hinge upon this very point. The door will not swing without a hinge.
To repair a broken door hinge on a 1991 Cherokee Briarwood, a new piece of metal should be welded in to hold the hinge. Then, a new hinge should also be welded in that is aligned with the door pin.
Drivers side fender well by the hood hinge
£35
Order it from e-trailer
If it is a rivet, then you must drill the old rivet out.
Broken wire in hinge area of door
by using only the information given, your answer is to replace the lower door hinge pin and bushing.
This is the most difficult hinge to replace on that vehicle. The original hinge is welded in place. The replacement hinge bolts in. In order to gain access to the back side of the hinge that is welded to the cab the entire dash assembly needs to be removed. Many times the original hinge can be rebuilt in place with pin and bushing kits and a little welding and drilling of the holes if they are damaged/oblonged. You will need a special tool to r&r the door hinge spring. This tool is available from your local auto parts store for less than $20.
My joints help me move.