[CntryClub007]

Note to everyone, my OEM plugs bit the dust @ 26,500...I replaced them with new OEM (all BMW had in stock @ the dealer), but I'm going to ultimately replace them with the B58TU1 plugs when they arrive. Misfires aren't fun! Surprisingly, car feels way stronger than this morning, I bet the plug was weak earlier.

I had the exact same problem in my N20 powered 320i when it was on meth and the same mods. Mandatory to replace plugs when going meth / tune, regardless of what people say!

Any other recommendations? I'm wondering if the B58TU1 plugs won't be cold enough / fix the problem.

[GT500R]

Originally Posted by SoCalCarGuy

Possible. But I'm s2 b58 e30. Should be making 420whp 500+tq

Meth can't be that much off the line. I'm going to be near sea level in cooler weather today. Let's see how this pans out.

Did it pan out?

[SoCalCarGuy]

Originally Posted by GT500R

Did it pan out?

Too much traffic and no open space. I did manage one run. New PB for 1st gear. DA and weather make a big difference.