Rough idle
#1
#2
#3
numerous things, mine is doing the same thing. check for vacuum leaks, next the IAC should be taken off an cleaned, EGR clean that, make sure the DPFE isn't clogged. do yourself a favor and go buy a Haynes manual, and ohmmeter. this way you can check the specks on these components, to make sure they don't need to be replaced.