Haven't done a diesel purge. Primary and secondary filters are new, tank screen is removed. Fuel is flowing to injectors. Cracking the lines while turning over engine shows fuel weep. While in the shop it ran on straight diesel out of a jug rather than on my blend - starting via fogging the intake with something, I guess. While it ran at rpms over 1500, it died at idle.

Is a Diesel Purge my first step?

It is due for a valve adjustment. Could improper adjustment cause this issue?

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1983 300SD, Silver/Blue, 230+K (rebuilt at 196K)