Traction control questions.
10-06-2012, 12:14 AM
#1
Thread Starter
Join Date: Apr 2012
Location: mi.
Posts: 9
Traction control questions.
Hello new to mustangs. 2004 gt manual
Is it true that the traction control works by engaging the rear brakes?
Would having different size front tires change the system? (I heard it senses difference in wheel speed front to rear)
Would having more hp the stock change it? mine is supercharged.
Reason for questions is I dont really feel any change with traction control on or off. Wheels still spin. Granted I haven't done a huge long burn out, just some mild holeshots.
My wheel spin light does come on dash board when wheels spin.
Thanks for any info.
Is it true that the traction control works by engaging the rear brakes?
Would having different size front tires change the system? (I heard it senses difference in wheel speed front to rear)
Would having more hp the stock change it? mine is supercharged.
Reason for questions is I dont really feel any change with traction control on or off. Wheels still spin. Granted I haven't done a huge long burn out, just some mild holeshots.
My wheel spin light does come on dash board when wheels spin.
Thanks for any info.
10-07-2012, 05:44 AM
#3
TECH SAVANT
Join Date: Dec 2006
Location: Saint Augustine, FL
Posts: 10,938
The traction control is relatively sophisticated and uses engine torque control via altering timing and fueling (it will shut down injectors sequentially if needed), and if necessary it will use the ABS to apply braking to the wheel it detects is spinning.
This is from one of Ford's 2002 industry press releases [emphasis added]:
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OP, when you press the traction control switch does the yellow indicator LED turn on and off (LED on = t/c off)? If not, and it is always on then it is likely that traction control may have been disabled in the tune.
This is from one of Ford's 2002 industry press releases [emphasis added]:
The traction control system for the Mustang combines brake and engine management to control wheelspin. When any of the four ABS/traction control sensors detect that a drive wheel is spinning at a rate higher than its counterpart, ignition spark is retarded and the fuel/air ratio is modulated to attenuate torque delivered to the slipping tire.
If the condition persists, cylinder cut-off occurs, brakes are applied to the wheel with low friction, and power is transferred to the other drive wheel. The driver is informed of TCS events via an indicator light in the instrument cluster.
TCS may not significantly improve traction when both wheels are on a slippery surface, but it optimizes the use of available traction. The benefit under this condition is improved vehicle steerability and stability provided by controlling excess wheel slip.
If the condition persists, cylinder cut-off occurs, brakes are applied to the wheel with low friction, and power is transferred to the other drive wheel. The driver is informed of TCS events via an indicator light in the instrument cluster.
TCS may not significantly improve traction when both wheels are on a slippery surface, but it optimizes the use of available traction. The benefit under this condition is improved vehicle steerability and stability provided by controlling excess wheel slip.
OP, when you press the traction control switch does the yellow indicator LED turn on and off (LED on = t/c off)? If not, and it is always on then it is likely that traction control may have been disabled in the tune.
10-08-2012, 06:57 AM
#6
TECH SAVANT
Join Date: Dec 2006
Location: Saint Augustine, FL
Posts: 10,938
10-08-2012, 07:00 AM
#7
TECH SAVANT
Join Date: Dec 2006
Location: Saint Augustine, FL
Posts: 10,938
10-08-2012, 07:59 AM
#9
TECH SAVANT
Join Date: Dec 2006
Location: Saint Augustine, FL
Posts: 10,938
285/35-18 = 25.01" effective diameter;
275/35-18 = 24.81" effective diameter;
So, the rear tires are 0.8% larger diameter than the front. This is close to the 1.0 to 1.5% that is known to create problems, and could be enough for the ABS to disable itself.
Is the ABS lamp on? Does it prove out (come on for a few seconds) when you first turn the key on?
275/35-18 = 24.81" effective diameter;
So, the rear tires are 0.8% larger diameter than the front. This is close to the 1.0 to 1.5% that is known to create problems, and could be enough for the ABS to disable itself.
Is the ABS lamp on? Does it prove out (come on for a few seconds) when you first turn the key on?
