Im putting my engine back together and I notice that my regulator is on my lower rail and the pulsation damper is on the upper. Its a Jspec LIM. Anyone ever seen this? I assume its fine this way but its the first time Ive seen it.

 

Ya it's fine - Jspec engine thing

 

all Jspec engines have fuel flow opposite through the rails compared to USDM.

it's normal.

be sure you hook up your fuel in/out accordingly.

 

and THAT is actually why when Guys Swap a JDM s5 Engine in,that they have a Problem with Starting up the car after the engine install,.
It is because they Fail to notice the Fuel rails are "opposite": to that of a USDM engine.
So they hook the Fuel Up in Reverse and since it is not flowing to the Primary Rail first,the car fails to start!
Proper fuel flow is IN from the Fuel Filter to the Primary,out to secondary,In to secondary and OUT to Return..Follow that and you car will get fuel!

 

Oh I didnt know you had to reverse the flow. Thanks alot guys, I would have been going crazy trying to fire it.

 

make sure your Line from the Filter goes to the Primary rail.The other fuel hose/line comes off the Secondary and goes back to Tank(return on firewall).