Hello, all.
I came accross a link to this forum on the cartalk.com forums while searching for stuff related to the issue I'mhaving with the wife's Legacy.
We bought a used '96 Legacy L wagon, 2.2 AWD auto. Nice car. Really great shape. Right after we got it, the knock sensor code came up. I held off on replacing it due to the cost. 2 weeks after we bought it, I drove it out of town. The temp was in the high 90's in Central Georgia. The car began having an intermittent hot-starting issue. After driving a short distance and parking the car for 10-30 minutes, when I tried to leave, the engine would spin over but not fire up.
The first time it did it, it took two or three tries, then it fired up. No problem outside that. The next day, it did it again. That time, it took 5 or 6 tries before it fired up. The day AFTER that... it took about 15 minutes.
All those times, I had no tools, no multimeter, no shop manual and no helping hands. When I got back home, I posted about this on several Subie forums. The unanimous observation was to replace the temp sender. I replaced the temp sender for the computer (not gauge) and the knock sensor at the same time. Cleared the knock sensor code and it ran great. Within a week it did it to the wife. Took 5 minutes to get it fired up. She told me about it. The next day, it did it again, and she sat with it for 15 minutes and called me on the cell phone. It finally fired up while she was on the phone with me and she drove it home. She has since barely driven the car and instead drove the Tahoe. (gulp, gulp...)
Anyway.... it is so intermittent that it does it when I have no way to troubleshoot the thing. All I do know is that the last time it did it to me, when it finally fired up, it sputtered as if it was just getting fuel. Otherwise, I have no further info. New knock sensor, new temp sender for the computer. (in coolant tube, right rear under intake)
'scuse me for the looooong explanation...