truck was sitting for a year wouldnt start changed fuel pump ran good made a stop turn it off then wouldnt start once startd ran slugish so i changed sparkplugs and all coils still same results then i droppd gas tank was full of rust cleaned it and put new fuel filter same results so now got fuel regulator and a another new fuel pump should i take out fuel injectors ? if so how i cleann them ?thanks ozzyf150