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here is a log of it hanging
16721

Sounds like the plan for the morning and i will get a log if it still acts up.

At first I just smoothed out the spikes down low but after the first test drive I returned it back and only adjusted above 2000rpm

Yup same ecm number and year

so I loaded a pretty basic tune, basically some more rail pressure, timing and duration. Go and drive it and at about 1400-2000rpm with about 5-15% throttle, let off suddenly and rail pressure hangs...