I've got a custom jeep rock crawler with an LS3 430 hp crate, 480 HP controller on, 6l90E trans, Atlas transfer, 5.39 gears, 42" tires. It's been tuned but we're having an issue with it coming off idle. If you floor this thing it will barley pull out of it's own way for the first 30 yards then it starts gaining momentum. We tried a bunch of different stuff with spark, throttle settings, etc but nothing seems to change it. There are no codes. If you floor it the pedal position shows 87-95% but the tps nred jeep no throttle.hplLS Jeep - ECM and TCM Tuned - Throttle-3.hptred jeep bad throttle signal.hplred jeep throttle sweeps.hplever goes above about 35% and the commanded TAC is the same. Anyone have any insight ass to what might be causing this.