My truck has recently started to run very rough; Low on power and very choppy. After about 30 minutes of driving it’ll clear up and run normal. Sometimes it’ll run perfect and then revert back running rough after it’s been driven a bit. According to my REM it’s using more than twice the fuel it should at idle (short term fuel trim when idling normal is ~50, when idling poorly it’s ~110.) My REM also says that all the sensors it gets information from are within normal operation. Does anyone have any ideas?