Engine issue came back today. The car has been running great with no issues for over a month now.
Yesterday, going down the freeway it happened again. Loss of power, rpms dropped going 60 mph. I shifted to N, and gave it a little gas, RPM went to 3K, I dropped it back into D and all was good for a few minutes.
Then the freeway turned into a parking lot, with bumper to bumper traffic for about 5 miles. Power loss came back numerous times. RPM would drop a little, no power, it was like I was coasting. Drop it into N, RPM would increase with gas, drop it back into D and I had power again. Now it only lasted a few minutes and the power loss came back. No CEL.
I got to my exit and headed home, only 2 miles to go. Emergency Flashers on and the power loss continued. A couple of times the engine died. Shift to N and crank, the engine would start back up. Drop it in D and limp along.
I got it in the garage, Park selected and gave it a little gas. RPM 3K but it was hunting, RPM between 2500 and 3500. I turned it off and started it back up and now it would hold a steady RPM. OBDII showed pending miss fire on all 4.
I've never had a Subaru perform this way and so intermittent over months. Weeks of normal driving, then it acts up again. NUTS, I say.