Q: Car starts very weakly after filling up with gas.

Recently I hit a curb in avoiding an accident, blowing the right front tire. After changing the tire, I took it in to the Subaru dealership to diagnose any problems, particularly the Check Engine light which had by now illuminated. After a few trips, replacing tires and so out, it was decided that my Engine light was the result of a bad engine fuel pressure solenoid. I had to wait on the part, so I drove it home. The following morning, I filled up, which is the first time I encountered the weak start up. The car seemed to be responding similar to a motorcycle starting cold without being choked. I took it back, and with the solenoid replaced, the light went out, and I drove home, only to find that the light illuminated again on the way home. The next day, they replaced another part in the same system, and now the light is gone. I was assured the weak start was caused by this faulty system, now replaced. However, now filling it up this morning, the issue remains unresolved.

My car has 138966 miles.
My car has an automatic transmission.