It shouldn’t.... but I like to go on a test drive with the intake off and a friend in the passenger seat with a shutoff board in hand. I’ve never had an issue as long as it’s not tuned to the point of rpm hang. Just my personal experienceI’ve been adjusting the ve some today to get everything possible out of it. My son and I turned up the fuel to the point of runaway, then backed it off to where it returns to idle after a short wot rev. I feel like it’s good but while I’m standing here (still shaking from how hard it is to kill the engine when running away) thinking could it runaway while out hot rodding the truck?