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Old 12-12-2013, 05:18 AM   #1
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Traction control

I have a 2001 mustang Bullitt. For some time I have had a problem with the ABS traction control system. At hard to medium exceleration when turning the traction control light comes on, and the computer shuts off fuel. The Ford dealer did a laptop test drive today with no codes. The only thing it showed was the different tire size from back to front was 1.5 miles per hour diff. I have 305x25x20 rear and 255x35x20 front. The dealer tells me that it is telling the computer that the car is in a skid. Should I change the tires? A lot of Mustangs have larger tires on the rear. My tires are taller on the front. Has anyone had this problem????????????????
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Old 12-12-2013, 06:25 AM   #2
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Originally Posted by mike fuches View Post
I have a 2001 mustang Bullitt. For some time I have had a problem with the ABS traction control system. At hard to medium exceleration when turning the traction control light comes on, and the computer shuts off fuel. The Ford dealer did a laptop test drive today with no codes. The only thing it showed was the different tire size from back to front was 1.5 miles per hour diff. I have 305x25x20 rear and 255x35x20 front. The dealer tells me that it is telling the computer that the car is in a skid. Should I change the tires? A lot of Mustangs have larger tires on the rear. My tires are taller on the front. Has anyone had this problem????????????????
The dealer is correct, having the rear tires be that much larger than the front would cause the same problem. Get tires of the same outside diameter, or just turn off the traction control--manually each time you start the car, or permanently in the tune...
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Old 12-12-2013, 08:12 AM   #3
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I would just turn off traction control. These aren't such powerful cars that it will make much of a difference.
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Old 12-12-2013, 09:15 AM   #4
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Get tires the correct size to fix this problem.

Your car came with 245/45-17 which are 25.7" tall.

Your rear 305/25-20 are 26" tall which is within an acceptable range. It's your front tires 255/35-20 that measure 27" tall and are screwing everything up.

My recommendation is ditch the 20" setup for 17's or 18's with tires that measure correctly.
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Old 12-12-2013, 01:09 PM   #5
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Mine doesn't work either. And all of my tires are the correct size. Id just as soon get rid of the whole crappy system as fix it though.

Welcome to the forum Mike! There are a handful of us Bullitt owners on here already and it's always nice to see more.
If you get a chance, post some pics in the "Lets see your Bullitt" thread in the Special Edition forum.
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Old 12-12-2013, 01:19 PM   #6
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Ugh, dubs on a SN95 KILL performance/braking. At least its on a bullitt where the brakes are bigger lol. And yeah, front tire is spinning "slower" than the back ones so the computer thinks there is an issue with the ABS/TC and kills fuel.

Go on tirerack.com and look up the specs on different size tires. They'll tell you what each size SHOULD be in total diameter and you want them to match up.

edit: And I would HATE to take a ride in that car... at least not without a mouthguard.
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Old 12-12-2013, 08:54 PM   #7
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Thanks for all the quick response. The tires came from Disscount Tire and they say they will help me with the price, since I have just purchased them. I will post if this solves the problem. Thanks to all and have a Merry Christmas.
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