Has anyone found a solution to this? I have a 2013 wrx with the P0300 code. I have replaced the following:
wiring harness
4 coil packs
3 new grounding straps
spark plugs 3 times
crankshaft position sensor
passenger side camshaft position sensor
coolant temp sensor
Brought it to a shop and they tested the fuel pressure and checked the intake for leaks.
I performed a compression test which checked out fine.
If anyone has resolved their issues beyond what I have replaced please let us all know. Thanks.