Hello, I purchased a 95 GSR with a JR supercharger and hondata ecu. Recently my check engine light came on and I checked the error codes and got a 43 & 16 Both are related to my fuel system. The car ran fine I didn’t notice any problems.

My fuel pressure @ idle is around 31psi (maybe low?)
When I increase the RPM it shakes and goes up to about 35
then when i release the throttle it drops to 30 then back up to 31

I pulled the neg on my battery for about 5 mins put it back on and started the car fine. No light no error, I don't know If I should be worried about this problem or not.

Any suggestions as to what I should check out?

On a side note my fuel gauge stays at full until there is about a half a tank left then goes down quickly and uniformly. I don't know if this prob is related but I thought I'd mention it.