Cm2250 Won't prime/no fuel in water separator

[tree98]

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no trouble starting and seems to run ok (other than not building enough boost and lower power).

Rail pressure isn't dropping either, its perfect.
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Maybe the davco is working fine and your low boost, low power problem is something unrelated. Its not uncommon for the fuel level on a new davco filter to be very low and still work just fine.

Just a thought