The sliding door on your 2001 ford winstar will not open is it the fuel cap or fuel door on that side of the car?
The fuel cap/door would not affect the door operations.
See "Related Questions" below for a few other ideas for misbehaving doors
What do you need to check on the sliding side door on a 96 ford aerostar to see why the door drops after opening it?
How do you adjust a sliding electric door which wont latch - Windstar 2000 Passenger rear door closes but pops back open especially in cold weather Can the steel pull cable be tightened or loosened?
There's a spring inside the keyless entry pad door lock on 2001 Ford Explorer Sport Where do you connect this spring?
Your 2003 Ford Winstar has a ticking sound related to the AC and heater and it will not put out heat when the control is moved to hot.?
Very common problem with Windstars. The problem is more than likely the sliding door. Open the door and spray WD40 on the door latches until you can move them with your fingers easily. There are two latches on the sliding door. One is towards the front where it meets the vehicle when the door is closed. The other is on the back of the door. After you spray both latches open and close the sliding…