#1
Hey borrowed my friends p bass to try and get into playing bass I'm primarily a guitar player but anyway been trying to set the intonation on it but the 12th note stays at around 30 cents sharp no matter how much I adjust the intonation
#2
May need new strings.... also, I usually do a basic set up in this order when I put on new strings...
1) Truss Rod Adjustment
2) Bridge Height Adjustment
3) Intonation

1 & 2 will effect 3
#3
Also, when you set the intonation. Smack the end of the screwdriver to make sure the saddles are moving correctly.