LA_F150

those are the round shiny things used for target practice. lol

hushedfury

Then you're doing something wrong, either fat fingering a value or not having the latest version of Forscan.

For proof, here's a guy who used the calculator in the spreadsheet to update his 2019 Lariat.

https://www.f150forum.com/f118/recal...8/#post6291994

Your post contains bad information that other people might be inclined to follow.

LA_F150

Wrong- You are not fully educated on the subject at hand. The "normal" method of entering tire size was done properly and resulted in BCM / PCM DTCs and CEL. It is a known issue for some when inputting non stock tire sizes. Some folks may get no DTC, some folks may get a low level BCM to PCM DTC that does not result in CEL. Keep in mind that every year of F150 and engine / trans combo has different strategy files, firmware etc on modules. For my specific truck, the PCM will not accept tire sizes that it does not like, likely due to its programming. The method I ended up with is used by others as well. Even though this situation is not as common, it is a properly functioning alternative method to use if the "normal" method does cause a problem. In short, there is an acceptable proven solution available if needed.

hushedfury

Ok buddy. The issue arises when you use a hex value for tire size that's outside the hard coded upper limits. However, the tire you're using generates a hex value that is smaller, or nearly identical, to what other users have reported using for 2018 vehicles and posted on the spreadsheet, pointing to your issues being user error instead of your tires being over that hard coded limit.

https://www.f150forum.com/f2/reprogr...orscan-440350/

I'd even go so far as to suggest that you try 09F4 (used by baddceo on his 2018 Limited) instead of the calculator value of 09F2 as the difference is 2mm.

As for the F250 forum thread where you got the idea to change the axle ratios, even they tell users to only change axle ratios to different factory values which you've not done.

LA_F150

You are still absolutely wrong and operating within a vary narrow scope of 'theoretical' knowledge. e.g. you have not tried it, not done it, have not reviewed and worked through the errors, and do not have the same truck as I do. If the normal procedure worked, I would be using it. I have swapped other tires as I have a set of max tow 17" wheels / tires and changing to that size in the BCM is not a problem. This is not a new issue- it is uncommon, but not new. I too was very surprised by the error since my tire size is under the talked about max limit. https://www.ford-trucks.com/forums/1...an-no-cel.html - Like I said, and let me repeat this again s-l-o-w-l-y - most will not have this issue using the normal method. some will only get a very low level BCM>PCM communication error DTC that does not result in CEL, which is typically ok to leave alone. So for them, use the normal method. For some who do have the CEL issue and normal method does not work, try the axle ratio method. or worst case, choose a "closer" tire size value and live with the minor speedo inaccuracy. Less than 3% is no big deal.

There is zero evidence that choosing a stock value for axle ratio is required, and I have tested it. You do not understand how axle ratio is being used by the ECM/BCM. From my testing it is only being used to calculate overall final drive ratio in similar manner as the tire size setting. The exception is, the PCM is not being picky about axle ratio value like it is with tire size value, on my specific truck. I do not know about anyone else's truck nor do I claim to, just what worked on mine.

hotdogtaco

That's a good idea! I haven't fooled around with the USB hookups yet. If you save a video to your USB device (USB storage in this case) can it play through the infotainment system?

2017bluetruck

Sheesh, I thought this was a

What did you do to your truck today?

thread. Not a "Bitch about what someone else did (apparently successfully also) to their truck today." thread.

I have used FORScan to change my speedometer and the directions mention possible conflicts and error DTC's with some settings and trucks. KM

LA_F150

I'm going to have to get one of those- the small form factor is nice. right now I have been loading up my iphone but this looks like a better option. Two years ago I used a cheap fanless PC, CD drive and J River Media Center to rip all my CDs to a NAS. So I have about 550gb of ripped cataloged and tagged music in full res flac format (wife and I had a lot of CDs!). From there I used another program to rip an identical copy of the library to 192k mp3 for portable use.

the CDs have been used regularly at the shooting range (valley out behind my house. lol)

storkpkp

iTrader: (4)

No video. Audio only

LA_F150

Video- I wish! I'm still waiting for IOS 13.4 jailbreak on 11ProMax so I can use Carbridge with Netflix / Youtube.