2000 Honda Accord, 4 Cylinder - car dying.?

My 2000 Honda Accord is dying when I slow down to stop or make a turn - it goes to a real low idle and dies when I brake. Check engine light is on - had codes ran and it stated something about cylinders mis-firing. I replaced plugs to rule that out and the wire are not that old - still having the issue. Fuel Injectors maybe?
error codes are:

p0300-304 - Misfire Detected in Cylinder

&

p1491 - Exhaust Gas Recirculation (EGR) Valve Insufficient Lift

Assuming the 1491 error may be triggering the misfire errors