Ranger tire size change reprogramming
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Ranger tire size change reprogramming
Greetings all:
Got an urgent question here. I'm trying to get my 05 Ranger Edge recalibrated for a tire size change and having trouble. I went from the stock 255/70-16 to 265/75-16 (30.1 inches to 31.7 inches diameter). The local Ford doofs attempted to reprogram for this and told me that the Ranger's PCM wouldn't allow for that much change (and charged me for the privilege).
This doesn't seem reasonable to me after seeing so many people running 32+ inch tires and from the info I've read about aftermarket programmers. So, is this legit?
Vern
Got an urgent question here. I'm trying to get my 05 Ranger Edge recalibrated for a tire size change and having trouble. I went from the stock 255/70-16 to 265/75-16 (30.1 inches to 31.7 inches diameter). The local Ford doofs attempted to reprogram for this and told me that the Ranger's PCM wouldn't allow for that much change (and charged me for the privilege).
This doesn't seem reasonable to me after seeing so many people running 32+ inch tires and from the info I've read about aftermarket programmers. So, is this legit?
Vern
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From: Denver
A couple of thoughts:
1. Unless they changed something from 04 to 05+ that I'm not aware of, the tire size is a simple change in the ecu program. I think they scammed you.
2. Since Ford tends to make speedometers read a little high from the factory, your indicated speed may be closer to actual now than it was with the factory tires.
1. Unless they changed something from 04 to 05+ that I'm not aware of, the tire size is a simple change in the ecu program. I think they scammed you.
2. Since Ford tends to make speedometers read a little high from the factory, your indicated speed may be closer to actual now than it was with the factory tires.
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Ahhh, so let me understand this (correct me if I'm wrong): There's nothing in the vehicle computer that inherently limits the tire size calibration to the point that a 30 inch to 31.7 inch change wouldn't work.
These guys kept telling me that it was the PCM limiting them to certain sizes, I think it might have been the laptop software and they didn't have a clue what they were doing.
Vern
These guys kept telling me that it was the PCM limiting them to certain sizes, I think it might have been the laptop software and they didn't have a clue what they were doing.
Vern
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Just as a ref for why I'm doing this, our inspection rules up here require that if the tire size is changed on an ABS equipped vehicle, the computer has to be recalibrated and stickered to indicate the change. This is a very recent change and I think the dealerships aren't swift enough to deal with doing this.
Vern
Vern
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You can get a bama programer at www.jusnesmodified.com, and it will correct your speedo and add a few ponies, and has been known to increase mpg a hair. A very worth wild product, a lot of us use it here, it's great.
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I'd love to get the programmer, the problem is that I could correct it, but I wouldn't have the official sticker that says it's been changed and the inspection people wouldn't accept the larger tires (sigh). Rock and hard place.
Vern
Vern
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I see your point, but people swap tires a round all of the time, I'm sure there's a lot of speedo's off due to tire swaps. I went from 245's to 265's and I have the bama, but never corrected the speedo, it didn't seem to be off enough to worry about, maybe some time I will. What concerns you the most, that your speedo is correct or that it's certified correct, just trying to see exactly where your comming from on this.
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From: Maine
But you don't live in Maine, Wendell. They're a little funny about tire sizes here.
I haven't read the latest inspection manual (goes into effect today, I think)- did they get rid of the ambiguous "two sizes" rule completely? It would seem you could make a case for falling under that, if they didn't.
I haven't read the latest inspection manual (goes into effect today, I think)- did they get rid of the ambiguous "two sizes" rule completely? It would seem you could make a case for falling under that, if they didn't.
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From the inspection manual:
(m) If the size of any tire is changed beyond the range of tires recommended by the manufacturer on a vehicle that is equipped with an antilock braking system, the vehicle’s computer and/or other appropriate components must be changed, reprogrammed or modified so that the vehicle is synchronized to the
new tire size. This change must be documented, and that documentation must be kept with the vehicle.
The documentation must include, at a minimum:
(1) The date of the alteration.
(2) The original and replacement tire sizes; and
(3) The name of the person who performed the recalibration
or resynchronization.
Vern
(m) If the size of any tire is changed beyond the range of tires recommended by the manufacturer on a vehicle that is equipped with an antilock braking system, the vehicle’s computer and/or other appropriate components must be changed, reprogrammed or modified so that the vehicle is synchronized to the
new tire size. This change must be documented, and that documentation must be kept with the vehicle.
The documentation must include, at a minimum:
(1) The date of the alteration.
(2) The original and replacement tire sizes; and
(3) The name of the person who performed the recalibration
or resynchronization.
Vern
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OK, now I understand, it's a state thing. "no", we for sure don't have that here. But doesn't the manufacturer allow for 1 size difference ? I went up 2 sizes , but he only went up 1, from a 255 to a 265, or does it got to be exact? The dealer told me they allow for 1 size difference, but maybe the state doesn't. I'm just trying to learn from you guy's what thier doing to you up there, so thanks for the info.
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You could try another dealer. Do you have an svt dealer near you that sells the roush mustangs and such ? We have one a round here that is an authurized svt dealer, thier more up on the performance end of ford products. They would be more apt to deal with gear and tire swaps and would be more knoledgble or willing to help you, it's not like it can't be done.
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From: Denver
Originally Posted by vburke
From the inspection manual:
(m) If the size of any tire is changed beyond the range of tires recommended by the manufacturer on a vehicle that is equipped with an antilock braking system, the vehicle’s computer and/or other appropriate components must be changed, reprogrammed or modified so that the vehicle is synchronized to the
new tire size. This change must be documented, and that documentation must be kept with the vehicle.
The documentation must include, at a minimum:
(1) The date of the alteration.
(2) The original and replacement tire sizes; and
(3) The name of the person who performed the recalibration
or resynchronization.
Vern
(m) If the size of any tire is changed beyond the range of tires recommended by the manufacturer on a vehicle that is equipped with an antilock braking system, the vehicle’s computer and/or other appropriate components must be changed, reprogrammed or modified so that the vehicle is synchronized to the
new tire size. This change must be documented, and that documentation must be kept with the vehicle.
The documentation must include, at a minimum:
(1) The date of the alteration.
(2) The original and replacement tire sizes; and
(3) The name of the person who performed the recalibration
or resynchronization.
Vern