2002 need help with codes
 

I have a friends 02 mountaineer. I replaced the motor and had a no start, after replacing the fuel pump the got the truck to start 3 different times. Then all the sudden boom no start again. Its throwing 2 codes p0230, and p0231 Ive searched the internet for what the codes mean and im left with not much to tell my buddy at this point. I just put a new fuel cut off switch in as well. His truck sat in his driveway for 2 years before he decided to fix it. Im just hoping anybody on here can help me out. Its a v6. It has fuel pressure, and I double checked to make sure I didn't pinch any injector wires when installing the plenum.