I made the adjustment from original position of 5, down to 4. I had to drive up to madison, maybe 350mi. I had the yakima bars w/ faring and 31 spare (I only put it up there when I leave the city). I could get 12mpg if I drafted a semi at 65. Poor compared to before adjustment, easily 20mpg under same conditions. It seems to need huge amounts of fuel if it runs lean, performance was poor from stop as well. I adjusted the dial back up to 5 and then sligtly higher, not quite 6. Runs much better. I took the yakima bars of too, so bare top, looks funny. But I'm getting much better performance with it running richer, duh, and it seems I'm getting the same mpg as when I was running on reg87. I'm going to leave it like this for a few tanks and see what the mpg averages. After that consider running even a little richer, maybe 6.5. One thing I did notice running richer, it almost stalls when first started. Right after start up, it stumbles once, almost stalls and then runs fine. When it was really cold, after I first installed, but no adjustments, it did the same thing, sometimes actually stalling if below 0. But then started right up, and ran fine, no stumble or stall. I attributed it to the cold, but it is getting warmer and still doing it. It seems to need to get a signal from the sensors that it is running really rich, so the PCM will make some dramatic change that compensates for the ethanol.
I'm planning to do a tune up one of the next few weekends. New plugs, wires, cap and rotor, and fuel filter. I just got the oil changed 1000mi ago. I'm planning on doing mopar cap/rotor and wires, but I was looking at some plugs called Halos. Link;
http://www.lsgbrisk.com/
Not sure if I want to add another unkown to the mix.
