Quote: whats weird is it had &0 lbs cold . then lost the pressure. I have the intake off now and the lifters band isn't coming out of the hole. it's 40 psi at idle then drops from there as rpm increases. will be zero at 4000rpm. no I haven't ran it much because of this. will be pulling it soon.
With it cold the oil pressure will be higher and as it warms up will drop due to the viscosity change.. it sorta sounds like the by pass is going open as soon as the rpm comes up.. but you said you changed the pump
