I have a problem with a 15 mustang gt 5.0 coyote , he installed a Whipple supercharger with 10 psi , Bosch injectors also 58 lb / hr . Driving at low rpm is good, in WOT very good air-gas mixture , the problem is the constant speed between 2500 and 3000 rpm , the car moves up and down repeatedly acceleration, and I have some time invested and can not find the reason , I'd appreciate your help.