gsjack

hi. i'm a new member.new to lexus too. had other cars which i thought good at the time, but nothing compared to '98 gs 300 sport. flat cornering, good overtaking power. great. now have sudden misfire. not driven it far enough to diagnose how and when. it's combined with a backfire. i thought i was buying renowned reliability. maybe a neglected car? can anyone advise please? seems to be a wealth of knowledge having read some of the input. thanks.