I know the code is for "rail pressure too high", and I did some searching and saw some good ideas and info on it. Perhaps you can provide some more insight... I sold an Edge Juice with Attitude to someone, it was run on my truck (prior owner mostly), and ran fine. Ran it on my truck for about 1k miles on the lowest level, including the trip home when I got the truck, and no issues. New owner of the Edge installed it, fired up fine, drove around a bit, then it's pulling back around 2k RPM, and throwing a P0088 code. Then he said he fired up a few times later, and no more code. Then later in the day... code again. I thought maybe a loose connector? He has it on level 1. Just trying to brainstorm to help him out. Any ideas? Truck is a Turboback/Intake 03 6spd. Thanks.

-J