Just reading along and here is what I have done, for years on my 99 5.9 I changed the fuel filter above the starter once a year ( 12 to 15 K) with no problems ever. After buying a new to me 2016 2500 with 20K miles on it and reading and having WIF problems, I changed both filters and problems seemed to go away for about 3 k miles then WIF was intermittent so I started troubleshooting took both WIF sensors out and cleaned and checked wiring, intermittent WIF continued so I ordered both sensors and with my troubleshooting knowledge from 50 years of mechanic work (change only one thing at a time) and look at the results, so I changed the rear sensor only at 30k miles and WIF problems went away now with 42 K and 18 months all is fine still, probably time this summer to change both fuel filters again and I still have the front sensor in stock. Just some of my process to try and solve my problems!!
gtwitch in wyoming
gtwitch in wyoming