- Aug 25, 2017
- 2007 E90 335i 6MT
Hello all, i am stumped on what could be causing my rough idle. I have index 12's, ngk 95770(forgot what my shop gaped them to) carbon blast and new coils all withing 3 months. The only thing that hasn't been changed is my hpfp. I don't suspect it to be the hpfp since my rpms at idle aren't stumbling. Any input would be greatly appreciated.