jeffsciv23

i have a 99 ex that i just recently boosted again and am getting code 71, 72, 73, and 74 which is me misfiring on all cylinders. it never did it before when i was boosted so why would it do it now? i just changed the wires and plugs (bcpr72-11's) gapped at .30.
cleaned the rotor and double checked the wires and plugs and everything looks fine but everytime i reset the code, it comes back once i hit like 4 psi.