started getting the dead pedal and code P0216 about a month ago on my 1999 2500 so I know my VP44 is going. I was running about 6psi between the filter and the pump so I decided to replace the lift pump with the Galcier Diesel GFS-392. Got that on at midnight last night (great kit!) and am running about 20psi at idle. On the test drive this morning I am getting surging at idle while in gear. RPM varies up and down about a 100 rpm. Seems fine at speed. Is this just another sign on an almost dead VP44 or did I screw something up in my GFS-392 install?
I bought a replacement VP44 from mwfi.com and am having a local shop install it this week - don't know if should risk driving the 20 miles to the shop.
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99DCTD2500 Auto 4x4 3:54 Stock except K&N and GFS-392 lift pump kit

 

This may help if you are mechanically inclined.

https://www.dieseltruckresource.com/...d.php?t=109032