i just replaced a cracked fuel injector and a bad seal on another one and the car is running fine now at idle. it will go into boost just fine. when i get up into 6-7k rpms it feels like my fuel is cutting out. it will go to redline but right about at 6k rpms you can feel the car bucking and striving to make it to redline. maybe a ignition problem? i just put in a new walbro 255 and nismo fpr (set to 45 lbs w/ vac line off). my wires are only a year old and the plugs are about the same and my timing is set to 15.