Originally Posted by Concillian
It can't be oil pressure, but it could be OCVs or position sensors. Aren't both of those different between USDM and JDM?
Well, with the EJ207 in the 32-bit cars (EJ255/257), we are actually using the EJ255/257 intake cams and position sensors.
You are correct though, the OCV's are different on the EJ207 vs the EJ255/257. And we are using the EJ207 valves since we are using the EJ207 heads and the EH255/257 ones don't fit properly.