Ready light blinking then turns off no start

I have a 03 Prius with 230k the when I was driving it home the other day It started to misfire like a bent valve I got it home stoped it and started it back up it ran fine no misfire for like 10sec then it went into misfire like it switches over.... I replace pcv and mas changed oil........ when I pull a plug any one of the four it’ll run fine no misfire the second I plugged it back in it goes back to misfire....... it had codes something about pressure and the misfire ones the battery died and now they are erased. I installed new battery and now I get the blinking ready light then it goes off and no codes...... on the dash there are a battery light, turtle, cel, little temp thing. The inverted pump is working when I turn the car to start it I hear a click over like it wants to go into gas engine mode but it doesn’t