I have a hard start problem with my truck.

I'm sorry forgot to tell you that was already done and with the vacuum hose & the fuel injectors replaced the pressured stayed at 50, before it went from 50 to 20 in like a few minutes but we checked after the hose and injectors were replaced and the pressure stayed at 50. Also when I go to start it if I can tell its gonna be a hard start I stop right away and turn the power on and off 3 times but no codes it says "p done" where my odometer is, so its really getting frustrating and I also got a squeaking noise coming from my passenger side rear tire but stops when I engage the brakes and it comes and goes I noticed that when its damp or wet out when I take it out for the drive my brakes lock really easily with just a little push on the peddle but goes away after a few times, I'm thinking that the squeak could be a bearing I checked the front and they look good but haven't checked the back drums. But back to the starting problem with 2 bad injectors leaking fuel could that mess with the spark plugs? I was just gonna replace the 2 but thought I might as well do all 8.

I have the same problem ive replace almost everything. Just replaced all 8 injectors yesturday. Now today check engine light came on and throwing code misfire on 1. Please help !