my ts 2.6 efi misfires backfires at between 2000-3000 rps only when hot after 30min driving wheni i stop i rev it up and it kind of misses at 2500 rpm i have changed the plugs hd leads dizzy air filter fuel filter i removed the air intake hose and it was full of oil i cleaned it drove to work this morning 40min went fine came home after work 30 min started doing it again got it home and reved it and was missing at 2500 rpm do i remove the throttle body and clean it or is there something i'm missing