AE won't change speedometer.
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Posting Guru
Joined: Jan 2008
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From: Trenton, MI
AE won't change speedometer.
I know it wrong thread but there tons members with AE.
I had early 99 or late 98 F250 superduty 2wd with 5.4L
Previous owner put bigger tires so that explain I only get 11 mpg.
AE say stock tire size is 30 and tires I had are 32". I try set to 32" I get message say This request not support by service.
How I do to get that fix?
I done many times on powerstrokes no issue but this one first time I had trouble with it.
I had early 99 or late 98 F250 superduty 2wd with 5.4L
Previous owner put bigger tires so that explain I only get 11 mpg.
AE say stock tire size is 30 and tires I had are 32". I try set to 32" I get message say This request not support by service.
How I do to get that fix?
I done many times on powerstrokes no issue but this one first time I had trouble with it.
Post Fiend
Joined: May 2009
Posts: 5,470
Likes: 3
From: Pea Ridge, AR
Did you follow the instructions like on Ken's Website? IIRC you have to use the up/down not just enter the size. Otherwise it doesn't work.
https://docs.google.com/viewer?a=v&p...hmNTYwODNiYTUx
https://docs.google.com/viewer?a=v&p...hmNTYwODNiYTUx
Thread Starter
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Posting Guru
Joined: Jan 2008
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From: Trenton, MI
What I did was
Try 98 F250, 98 superduty 5.4L, 99 superduty 5.4L, 99 F250.
I keep get same message say This request not support by service.
But what I notice there label on air filter housing say PCM been reflash in 2001.
I click that Arrow it .50" each clicks. I get up to 32" then click Done. I get message say This request not support by service.
If it still won't let me program tires. I maybe try swap PCM from 2000 E350 and program tires.
But I try this on 00 F350 diesel it allow me change tire size.
Try 98 F250, 98 superduty 5.4L, 99 superduty 5.4L, 99 F250.
I keep get same message say This request not support by service.
But what I notice there label on air filter housing say PCM been reflash in 2001.
I click that Arrow it .50" each clicks. I get up to 32" then click Done. I get message say This request not support by service.
If it still won't let me program tires. I maybe try swap PCM from 2000 E350 and program tires.
But I try this on 00 F350 diesel it allow me change tire size.
Thread Starter
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Posting Guru
Joined: Jan 2008
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From: Trenton, MI
Tried 2000 and change computer.
Still get message this request not supported service.
How can I fix speedometer without fork $700 for new correct tires size.
Stock size is 30." and tires I had are 31.9 it basically 32"
Hotshot
Joined: Nov 2006
Posts: 11,286
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From: North of Greenville
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Posting Guru
Joined: Jan 2008
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From: Trenton, MI
Call them and they told me that change tires size are only apply toward diesel powerstroke but not for gas. They say different computer obdII
Look like I need call dealer to see how much it cost me to change tire size on this F250.
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Hotshot
Joined: Jan 2011
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From: Puget Sound
Drawback: Racking up more miles on odo than reality - diminishing the value of the truck quicker.
Hotshot
Joined: Jan 2011
Posts: 18,849
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From: Puget Sound
Oh for crying out loud... I looked at the time I posted that and can't even use the excuse "it was before coffee". Uh.... er... it was hot! Really hot. And I... uh.... was thirsty. Thirsty, yeah.
3 MPH is 5% at 60 MPH
3 MPH is 5% at 60 MPH
Senior User
Joined: Mar 2007
Posts: 473
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From: Issaquah, WA
it's linear. 6% more than whatever speed you are seeing. 3.6 mph at 60 etc.. Note that this will only turn your 11mpg into 11.6 mpg. So all things being equal, you might have something else going on.
i ain't rite
Joined: Mar 2005
Posts: 65,481
Likes: 5,542
From: Marlboro Mental Hospital.
Did you follow the instructions like on Ken's Website? IIRC you have to use the up/down not just enter the size. Otherwise it doesn't work.
https://docs.google.com/viewer?a=v&p...hmNTYwODNiYTUx
https://docs.google.com/viewer?a=v&p...hmNTYwODNiYTUx
i have been looking for this info for over 3 years now.
maybe now i can properly set my speedo to compensate for the 6 MPH difference in actual to speedometer. thanks
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