my trucks been acting up latley at a idle it runs super rough and about stalls out, if i shut it off and restart itll clear up for a little wile then go right back to it, it had a check engine light on i read the codes, there were for o2 senors. i went ahead and replaced both. no check engine light still running rough, truck has 2000 model 140,000 miles 5.9 v8. any pointers??