I have a issue when ever I sit at a point on the peddle over 70kmph. It feels like it's jumping a little or slipping. Slip,grip,slip,grip ect only when I cruse if I give it a little or back off a little it stops. Changed o2 sensor and plugs got spitfire coil packs nistune return flow cooler running 11psi stock everything else. Any advice or thoughts please guys thank in advance