Cab is coming back off. The only thing we can figure at this point is that air is getting in there. All of the fuel system tests show that the HPFP is fine, so until we get a for sure bad HPFP symptom, that is ruled out for now. While everything is apart, the rails are going to be checked out to see whether or not they are secure. Thanks for that suggestion Shane. I will continue to keep everyone posted.