Quote:
Originally Posted by JRod2014335i
I bought my 2014 335i in May of 2021 from ricart in Columbus Ohio, previous owner lived in blacklick ohio. The car has all the mods any normal 335i should have except a mhd stage 1 is loaded into the computer and it has a jb4 I'm just kinda wondering what exactly is done cause I can't get the tune worked out 100% perfect. Runs excellent but sometimes it runs like complete crap been pulling my hair out, I just recently seen its got a mhd stage 1 tune not a bef. I was going to add meth injection but I don't want to till I know for sure what it has done
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throw the jb4 out and I bet the tune will be fine