So I have an 01 Chevy Silverado and i have a little strip that i like to see how fast my truck can go 0-60. The problem is that when I'm accelerating, at around 40mph my truck "stalls"(like im pushing down on the gas, I can see my rpms stay the same but my truck dosent accelerate) its almost like it isn't getting enough fuel. My truck is tuned by Bully Dog and I thought it was because of the defuel settings but I turned them off and the problem still persists. Anyway, after about 4-5 seconds of this happening, my truck finally "kicks" into gear and accelerates normally. Sometimes, I can pump the gas slightly and get that time down to 3 seconds but its still there.