Hi. I am posting about our 2004 Forester with 118,000 miles It has been a fairly decent car for us except for this most recent problem that 3 mechanics (including 2 Subaru dealerships) have been unable to fix. The problem is this. When there is moisture in the air (humidity, rain) the car has a very rough cold start (sitting for 12+ hours). It will either attempt to turn over and not start or it will start but then stall when put into reverse/drive. If the car does start and I let it warm up for 5 minutes it will not stall going into reverse/drive and drives perfectly fine. If the car does not start on the 1st attempt it will start on a 2nd attempt about 15 minutes later. It does not happen with a warm start, and again it only happens when there is moisture in the air.
Other than this issue the car runs fine- no complaints. So right now it just stands as a minor inconvenience in that when there is moisture in the air you have to 1). let the care idle for 5 minutes before putting into reverse/drive if it DOES start or 2). wait for 15 minutes to retry starting if it DOES NOT start.
The mechanics have tested the fuel supply (no issue) and the computer shows no error. Since this problem is sporadic it has been hard to duplicate at the shop and the Subaru mechanics have stated that they have not seen/heard of this particular issue before.
Any guesses or similar experiences with this problem. We really would like to keep this as a family car for a while more, but would like it to be more dependable.