Yeah...Its always humid in SE Louisiana and we've had a bunch of rain the past couple of weeks. I hope its fixed for good...I never had a scary situation with it, but I lost all power on 3 different occasions between Christmas and 1/11 (purchased on 12/17). Twice after getting off the interstate and trying to take off from a stop and once trying to merge after the off ramp...all 3 times there were no cars around me...also countless misfires when taking off from a stop...So rar so good.

I hope this does fix it. I live in SE Louisiana too and hope all this rain is over with!!!! That is all it does is rain. Lol. My truck has been at the dealership since 1/3 and not getting it back till end of February.

Mine started having issues on a trip to Louisiana, from Houston, before Christmas. Loss of power happened twice on that trip and it was rainy and humid. I have not had the issue since, but conditions haven't been duplicated either, so I did not vote in the poll. Like others, I have less power and lower mileage with the new CAC. Currently have about 10,700 miles on the truck. 2012 Lariat. Interesting thing is that I got my best mileage on that trip to Louisiana, about 20 MPG. Several trips to San Antonio were 17-18 mpg, but I-10 between Houston and San Antonio is always windy and there is that 75 mph speed limit thing...

You can see the high blip(s) on the attached chart for the Louisiana trip. Now it's lower than ever. The first two fills after the high blips were with a reflash, but no new CAC. The rest are with the new CAC. I'm hoping it just needs to adjust to my driving again. You can see it is stepping up with every other fill which also corresponds with less/more highway miles.

My truck (2011 FX model) goes in next week for the new TSB CAC fix. I'm afraid of loosing my MPG's cause at the moment I get 21.8 at 68mph. Is everybody with the new TSB getting worse MPG than before the fix????? I might see if I can get the new CAC but without the update to the ECM. I will hold onto my old CAC just incase my MPG's go to crap.

Great to hear that. So now I think what may be an even bigger question - Why are some people seeing positive results and not all? Is it solving only the majority, but not extreme cases? Are the folks saying there is still a problem having a problem besides what 12-10-19 is addressing?

I cannot state that everyone is getting worse mileage. I am hoping mine improves with time. I have a 100 mile trip tomorrow and will set the cruise at 68 and reset the mileage thing and let you know what I get on a half hour run at that speed. I may get 21, not sure.

^^^Thanks ^^^ I drive 450 miles from Florida to South Louisiana (900miles round trip) every 2 weeks. Prime weather conditions for moisture buildup. I would hate to go from 21-22mpg down to 17-18mpg with the NEW TSB update.

I noticed no difference in mileage with mine. I get 19-20 MPG @ 68 and it drops fast once I get over 70...about the same as before. My truck actually drives much better since the TSB...of course, I've only owned it for a month and a half...

For Kitzi. 68 mph, 1/2 hour, temp 70f, dew point 67f, 6 mph head wind from sirrius, 19.7 MPG. . Not bad. Boost level was about -1.2 and RPMs 1800. Hope this helps.

Sorry. That was for BoostedFX, not Kitzi.