Program won't stay programmed
 

Tried everything I can think of...I change the tire size and gear ratio, but nothing changes. I go back in to see the numbers and they go back to 2550 and 3.55. I've loaded previous settings, same thing. I even followed the instructions Bill gave me over the phone. Any ideas?

Are you sure you're allowing the settings you've put in to be "programmed"? Once you set all the numbers you want, scroll to "Done". Then push <Enter> and the programmer will spend about the next three minutes programming your PCM. Let it do this to completion.

If you hit the <Menu> button after you put in the numbers you want, and even if you've scrolled to "Done", you will "back out" of the custom options menu and you won't save anything (or program anything).

- Jack

Another thought....

Are you going back into custom program, and not loading the previous settings first?
I noticed if you do, it just gives you the default values, not what you had previously programmed in under customizing.

Follow the Q+A sticky at the begining of gryphon programmers.
Here's the link.
http://dygytalworld.ehost-services13...=9248#post9248
If you follow this you shouldn't be having any grief.
Like Jack said hit "done"

Lars

That was my first thought too, but I believe he said he tried loading the "Previous Settings". I DO note that he says he "tried" this, which doesn't sound like it's the FIRST thing he ALWAYS does after opening the Custom Optons menu.

But then, if he's never created a valid "custom options file" by going to "Done" and hitting <Enter>, he wouldn't have anything to load.

Mexico Dan, do you see what we're saying here?

- Jack

Aha, I think that was my problem. So was I actually driving with the new options and didn't know it? I just hit load previous settings and checked my GR and TS, they are both where I put them. IF I was driving with them, then I still have the problem with my odometer being off by 150 feet. Bill thinks I have the wrong gear ratio on my tunes, it's 3.55, so I changed it to 3.73 and I'm still way off.

Anyway, thanks for the help. Much appreciated.

Here's a link to a post about axle codes: http://www.f150online.com/forums/3397005-post6.html

If you have not changed your gears, you should be able to find your code on the VIN sticker on the driver's door, under "Axle".

Mine is a "B6" - A limited slip 3.73 differential. What code do you read?

- Jack

26...so it's 3.73, good to know. Thanks for that link. Now I can figure out what non-limited slip means...

Limited slip means you get power to the wheel on an axle that is NOT slipping. With limited slip, on a 2-wheel drive vehicle, if say, you roll your left rear tire onto a patch of ice and it begins to spin, power will be delivered to the right rear wheel and that will push you off the slippery spot. If you don't have a limited slip differential, all the power simply goes to the slipping wheel and you just sit there.

The meaning is a bit more complicated if the vehicle is 4-wheel drive. You might have the ability to get power to the front if the rear is slipping or vice-versa. You also might have the ability to get power to ANY wheel that is not slipping instead of just the non-slipping axle. I honestly don't know which system we have on the f150.

So, looks like you don't want to take your truck into really slippery conditions (like an off-road mud wallow).

- Jack