ok, my problem is this.....first off my car runs fine and pulls hard through all gears if i just smash the throttle off the lights and just let it go through the gears, but when i am on a roll on and downshift, mostly into third gear, and smash it down it will start to pull hard then miss/hit fuel cut and i hear a loud pop once or twice. i know third gear puts the most load on the motor and thats where the tuning should be done at, my boost gauge sees 18 psi spike then down to 13 when i smash it. i have repalced the wires plugs fuel filter, o2 sensor. i think my car just needs a boost controller. tell me what you guys think