Hi I'm having some problems with my r34 gtt, only bought it afew wks ago, I brought it to insight Motorsport in Sydney for a tune because it is running high boost, he said he can't tune it when it's like that.... It has a high flowed gcg turbo, z32 afm, split fire coil packs, fmic, greddy boost controller which is working as a boost gauge only... Highflow fuel pump andHas 550 injectors.. I changed the standard bov valve to a turbosmart plumb back, cleaned out the highflow cat, swapped over all vac lines, made no difference... 1st gear is fine and second, it only shits itself at 3k revs in 3rd, 4th and 5th! I am changing plugs today anybody have any suggestions???