You need a fuel pressure gauge after the fuel filter. Advance has the mr gasket fuel pressure gauge $16 and You can get a line and fittings for like $6 maybe more with the T but this will allow You to know for sure if the fuel is there or not. Also, You don't mention the fuel filter light sensor going off this one only comes ON when there is vacuum inside the filter, could be as said fuel gelling.
I personally never used the Howe's bc I just don't see it around here and when I drive long distance I don't feel adventurous to start using a new additive in the middle of a trip, I use PS white bottle year round and some times 911 red bottle when I think it is getting too cold, again I have fuel pressure gauges on all My trucks so I can tell when the system is working as usual or not.
I personally never used the Howe's bc I just don't see it around here and when I drive long distance I don't feel adventurous to start using a new additive in the middle of a trip, I use PS white bottle year round and some times 911 red bottle when I think it is getting too cold, again I have fuel pressure gauges on all My trucks so I can tell when the system is working as usual or not.