Hi, I have a 2007 classic lbz that is stock with 246k miles and I'm throwing p0087 low rail pressure code I have changed filter checked rubber fuel lines for collapsing and also replaced fprv with ppe race plug .. any help would be great ... also my balance rates on injectors are decent number 8 cylinder is highest at 3.4 in neutral at operating temp.. and in drive only goes to 3.8 to 4.0 ... cylinder 2 is at 2.5 in neutral and 2.8 in drive..