thanks gays for the help ,,,the rotary keeps showing me the p0301 cylinder misfire also the codes p0138 ( 02 sensor circuit high voltage )(bank 1 sensor 2) ......p0137(02 sensor circuit low voltage)(bank 1 sensor 2).....and the p2096(post catalyst fuel trim system too lean bank 1),,,,also when im going in low RPM i can heard a little noise like vacuum leak ,,,,sometimes i smell gas in the cabin too ,,,,please can anyone help before i put the money on table .....

 

Do you have an aftermarket intake? Check the VFAD vac nipple to make sure it is plugged

Sounds like your rear O2 sensor could be done....

When did you replace coils, plugs , wires??