1993 Toyota pickup 3.0
 

have a 1993 Toyota pickup has new cat new muffler new cap rotor plugs wires mas air flow sensor truck has 65k miles on it so truck went and smog and it threw egr valve code so changed egr valve check engine light went off then can back on after 20 miles I need to smog truck but can't figure it out please help !!!!! And truck has new o2 sensor as well