Nice!!! I think it could be better if you were motivated on it. Lately I've been seeing 17's when the winter fuel and cold temps arrived. Had planned on doing a trans service and re-tune the ecu over the thanksgiving & christmas breaks but work had other plans. Been in TX for every week of Dec with just a few days home for the month. Expecting January to continue.

Tires are due to be swapped soon... tired of tippy toeing around in the constant wet conditions at home. While they are not down to the wear bars yet, loosing grip is quite easy. Have a near new set of the same tire but oem size waiting to go on.

 

Yeah, mostly I drive an electric vehicle and I charge for free at work, so I don't put much thought into how much gas the Dakota burns anymore, even though I drove it for this long distance trip. Mostly I just wanted to test it. See what it could do and it performed very well. That 4.7 is made for highway driving.

Speaking of Tires, I recently took the the truck to have a rear tire looked at as I could see a nail in it, and it was right on the edge of the tread. the outer edge. It was under road hazard warranty and they replaced it due to the placement of the nail. well, it was a great tire I mean lots of tread so I asked if I could have it thinking maybe I could patch it or whatever. well when I went home, I felt for the nail puncture on the inside, and it never made it through so now I have a nice spare.

 

Nice! gotta love a free tire.

Just got back, ran the tank down low on the dak (no time to fill it before last trip) & filled it up with the gauge needle sitting on the E red zone. Wife was with me on this trip and she panics on anything below 1/4 tank. Filled it up before getting back to town just to show her that there was plenty of fuel left. Had her look in the OM to see the tank capacity (24 gal), filled it up & it took 19.2 (?) gallons. She was shocked so I had her do more math & calculate the range based on mpg's. That number came out to 410ish miles if ran bone dry... odo said 335ish miles. Not bad at all.

 

My truck still has 8 gallons of gas in it when the 'low fuel' light comes on...... I have the 34 gallon tank in mine though.... and an 8.0 liter... so, maybe 80 miles worth of range, on a good day.

 

I had a response to your post but it did not post for some reason... ugh. knowing there are miles left in the tank is great but the only thing is need to be aware of the odo if the plan is to push it (last 10~20 miles to destination etc...) then ball park the amount of miles left based on mpg estimate. In my case 330ish miles is where it was done on the E mark, worst case in my mind is 60 miles @ 15 mpg iirc.

Made the tweak to the air temp fueling (air enrichment table) and dumped it in. will see how it does, seems like it was sucking fuel quite a bit in cold temps. No pinging, seemingly no change in performance.

 

Update: made some tweaks to the fuel enrichment on air temperature, leaned it out a bit. Also lowered the fuel pump enrichment parameter by 0.02 (iirc).

Been seeing (still) upper 16's to low 17's for mpg's on the winter fuel with ambient temps in the 35-50*f range.

Also, a while back I installed Autolite 3923's gapped at .035", thought I documented that here but could not find a post on it. Other users commented on getting approx 20k out of them before performance started dropping off so it will be interesting to see what I get with the reduced gap at the start. To date the motor has run awesome the entire time with the 3923's installed, no CE light this winter either, was expecting a P0306 code for the cyl 6 mis-fire but it did not return. Only difference is the y-pipe & cat back exhaust (could not get rid of that code... swapped injector, plug & coil when trying to fix it last winter). Was expecting it to come back In October 2026 when we switch the fuels from summer to winter blends (?) or whatever they do with them but it did not come back. That code went away in April 2025 with no changes to the engine setup (after the attempts to fix it). Only change recently was the y-pipe & cat back install.

Going to find out when I bought the Autolite 3923's and add it to this post with the estimated miles.

 

Checked with parts store, autolite 3923s went in around tday week, 2024.

Reading back i had posted in january that i had developed a misfire on #6, the 3923s did not fix that, (swapped coil, plugs & injector with no change). Added the ypipe & cat back over the summer & misfire did not return this winter (expected it to show up in oct/nov time frame when the winter fuel arrived)

Did a trans & transfer case service this weekend ... Diffs are next. 231k on it now, runs awesome, no codes.

Edit: Autolite 3923's went in around 210k

 

Also... removed this piece, after a pulling it, I can see thru the gauges that it was impacting flow too much. a piece of sheet metal would have bene a better fit. LTFTs shifted more lean after pulling this piece out, nothing that requires tuning.