quailly

Hi, I installed a FMIC on my old R33 GTS-t with exhaust and pod filter at the same time... Never really got to the bottom on the flat spot and misfiring at 5-6K. Re-gapped plugs to smaller gap, maybe around .7 or so and was just left with flat spot... Had a feeling the flat spot happened after the modifications, but never tried to reverse the changes, I've heard this is fairly common although there is anicdotal evidence that a power fc plus full re-tune fixed...