2350 intermittent fuel pressure issues

[NDISX15]

If he can send you that file get it from him and get it sent to someone here and/or rawze asap. There is an entire thread of the sh!tshow deletes that that have been reviewed here you can look at and see what 99.8% of these so called "tuners" (more affectionately known as "butchers" here) are doing to these 30-40k commercial engines.

Do not run that truck another second until you pop that head off the HP pump and have that file reviewed when you get it from the guy who did it.