ive got a 99 gsr w/ ls tranny...i currently have two ECU''s that i been switchin in an out...one is a p28 tunned ecu with 2 step...other is a regular p72...the p28 revs to 9 GRANDish...the p72 only lets me rev to 7 grand....both ecus seem to start v-tec at around 6,500 to 7,000 rpms...whats the problem...should i be using a different ecu? or could it be my v-tec solenoid??? PLEASE HELP!