Camshaft
 

Hey everyone, 2013 FRS Im ready to throw this car away. I started to get the coil pack issues, specifically with coil number 3. The Subaru Service Bulletin said to replace the wiring harness and coil packs to 2015 harness. I read a lot of people had great results with just repining the harness with 2015 connectors, I went that route. Took off the harness and repined the 4 coil connectors. Reinstalled everything and the car idled great. I let it idle for about 30 minutes to make sure it was fine before I drive it. Well after 30 minutes CEL came on. Scanned it and now P0390 & P0391 comes up, cleared it to see if it was a fluke and popped up immediately. Swapped sensors to see if the problem moved but no, stayed in the same bank and sensor. So I spliced in about a foot of new wires and a new connector. Still the same thing.
Any ideas?

Bad spark plug? - :iono:

Thanks for your reply. Spark plugs are a month old.

I can't tell from your reply, did you get new (or at least switch coil packs)?

The coil pack issues are gone now. Now its the P0390 and P0391 Camshaft sensor.