Forced Induction Discussion of turbos , superchargers , and nitrous upgrades on the G35

Boost hard on traction control?

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  #16  
Old 02-24-2009, 09:15 AM
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Originally Posted by GreenGoblin
What about a possible messed up sensor that is on the diff. I thought it measured wheel slip?
That is also a ABS sensor.
You have one on each side of the rear diff and it reads the encoder
that is on the axle stubs. on the front they are on the hub themselves
 
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Old 02-24-2009, 11:17 AM
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Originally Posted by BoostinJaxLR
Cars been boosted for like a year now, all the work was done at PF and was done flawlessly...ive not had any problems with it at ALL, until now.

Here is what is happening:

Regular driving around town with VDC on...no problems.

When i drive aggressively, get into a decent amount of boost where the tires would usually start slipping, it breaks loose even with VDC on... like its not working. It almost seems like it tries to work then stops. After doing that the BRAKE light, SLIP light and VDC light stays on, and traction control no longer wants to work at all...this makes me feel uncomfortable driving around without it on. It never did this until this winter when the temps dipped below 30, do you think the cold messed a traction control sensor up? Do you think the boost finally wore a sensor or the control module out?

anyone advice is appriciated and thanks for taking the time to read it.
I used a KPtechnologies VDC module which leaves the VDC in the state in which you set it, even after you turn restart the car.

I find that the VDC is a real pain in the @ss, so I mostly leave mine off, except when driving in the rain. My Toyo R888's in the rear do not like wet pavement.

If the Racelogic traction control module works out well on XKR's car, I'm probably going to give that a try.
 
  #18  
Old 02-24-2009, 11:42 AM
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my bad mis read what you wrote. Does the car do it in all gears?
 
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Old 02-24-2009, 11:47 AM
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Did you check you tire tread?...
 
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Old 02-24-2009, 06:27 PM
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Originally Posted by GreenGoblin
What about a possible messed up sensor that is on the diff. I thought it measured wheel slip?
Traction control is measured by the ABS sensors so it knows when to engage on what the ABS sensors are relaying to the computer.
 
  #21  
Old 02-25-2009, 07:14 PM
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i love this forum....


now ill admit how much of a sucker i am.

I checked the brake fluid, it was between the low and high marks...so im like whatever...ill fill it to the high mark. viola, perfection. I went out on my first test by stomping the brakes from 40mph, no brake light. i was like, success!

took it out on the main road and dide some 1-2-3 pulls and 2-3 pulls and it worked perfect, the slip light blinked when it saved traction and everything worked perfectly again.

Thanks for going over and trouble shootings possible issues with me dudes...im kind of embarrassed it was brake fluid that made me spazz out about it. Imagine the techs face when i pull up in a turbo G, talking about i think my traction control is broke...when all it is is brake fluid. ugh

thanks again guys! happy v8 hunting
 
  #22  
Old 02-25-2009, 07:23 PM
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nice to see the problem was solved even if it was something stupid like that
 
  #23  
Old 02-25-2009, 07:48 PM
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  #24  
Old 02-25-2009, 07:50 PM
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^^ hehe. thanks for that.
 
  #26  
Old 02-25-2009, 09:18 PM
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glad it was a simple fix
 
  #27  
Old 02-27-2009, 08:15 PM
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You really didn't "fix" the problems - low brake fluid is most likely a sign that your brake pads are worn. However, since you added fluid, most likely when you replace the pads you will have too much fluid in the system.

Or, you may have a leaky brake line or caliper.

It may be worth looking in to the brake system a little deeper to see if you can figure out where the fluid went.
 
  #28  
Old 02-27-2009, 08:18 PM
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Originally Posted by KPierson
You really didn't "fix" the problems - low brake fluid is most likely a sign that your brake pads are worn. However, since you added fluid, most likely when you replace the pads you will have too much fluid in the system.

Or, you may have a leaky brake line or caliper.

It may be worth looking in to the brake system a little deeper to see if you can figure out where the fluid went.
+1
I topped off my fluid and a month later changed the pads. I forgot I topped it off and ended up with a huge mess of excess brake fluid that spilled everywhere. Funny part is I did not unscrew the reservoir but it overflowed anyways.
 
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