I have a 2001 4.6 DOHC Cobra. Stage 3 cams, lots of engine mods, 90mm SCT MAF, 39lb injectors CAI, accufab TB, BBK headers and more. I have had 2 tuners try to help. 400 RWP on dyno. He is my problem. It stalls all the time. When it idles it's fine but will randomly stall like someone turned off the key. It will start back up no problem. Sometimes coming to a stop it will stall. I have smoked for vacuum leaks, changed all epa devices and even removed the EGR system .Also changed out the pcm too. Random misfire code sometimes but I was told due to cams. One tuner jacked up the idle so high it's undriveable. Only 300 miles on the new motor. Any ideas what to look for or do?? I am giving up