I recently purchased a 2008 F-250 6.4l has the SCT tuner with tow tune currently running EGR delete and SB cold air intake. I bought it with an issue with the engine or trans i can’t seem to find it. So the issue is intermittent a few days it will run fine shift out all gears high rpms with ease. Then some days it will throw a check engine light with limited rpms to 2500 and stall not die out just stall anybody got any clues? The freeze frame code is fuel rail pressure too high so gonna start there unless someone else has had this issue and that’s not it. Thanks