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Old 04-12-2014, 02:24 AM   #1
Jaredxxx24
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weird problem need help please

When driving my car fast around corners my dsc light will flash and i will feel a weird knock from my steering and sometimes vibrations. The wheels are not slipping, it just seems like the system will randomly panic in the middle of a tight corner. This problem seems to have started after installing my zhp steering rack. My mechanic says that my steering column bearing has some play in it and I don't know if this related to the problem I'm having. I hear a knocking noise coming from the front right side of the car while driving over some bumps and my steering wheel has a slight shake about 60% of the time at speeds over about 55 mph. Tonight while driving about 70 mph I hit the brakes and heard something bang and then a hissing noise followed that would fade in and out. The hissing noise seemed to happen after braking but I'm not certain of this. What stumps me is that I have replaced EVERYTHING on the front of my car. meyle control arms, new zhp rack, tire rods, struts and mounts, springs, sway bar and bushings, end links, coupler you name it (except the steering column). My car just doesn't feel right and I scratch my head every time i crawl under it trying to find the issue. Can anybody give me a clue? FYI- I didn't have my car aligned after the steering rack swap but the car does drive pretty straight. Any help would be greatly appreciated. Thank you
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Old 04-12-2014, 08:44 AM   #2
dmax
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I think you have two things going on.

Check the brake booster in the drivers side drug bin...it's a vac operated device...sounds like you have a leak in hose or failure in the booster itself.

As far as the dsc, it sounds like the suspension work you did made your car, perhaps, stiffer, and thus a bit more likely to trigger dsc as you corner too fast on bumpy roads...is all. You're seeing the result of your car knowing your wheels are slipping before you do. No worries about that, I don't think.
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Old 04-12-2014, 10:52 AM   #3
Jaredxxx24
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Quote:
Originally Posted by dmax View Post
I think you have two things going on.

Check the brake booster in the drivers side drug bin...it's a vac operated device...sounds like you have a leak in hose or failure in the booster itself.

As far as the dsc, it sounds like the suspension work you did made your car, perhaps, stiffer, and thus a bit more likely to trigger dsc as you corner too fast on bumpy roads...is all. You're seeing the result of your car knowing your wheels are slipping before you do. No worries about that, I don't think.
Drivers side drug bin....you just made me die laughing; you're a funny guy dmax. On a more serious note, the roads I take fast corners on are smooth and I'm not pushing it to the limit... I really don't feel the wheels slipping. Its just in the middle of a turn that I feel a weird knock and or vibration from the steering and my dsc light illuminates. Maybe this is simply a result of the loose column bearing but my mechanic didn't say that it was in terrible condition; just that it had some play. As far as the vacuum leak coming from the brake booster, that would make sense. All of my hoses there literally look brand new but perhaps there is something I'm missing

Last edited by Jaredxxx24; 04-12-2014 at 10:53 AM.
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Old 04-12-2014, 06:16 PM   #4
323i jlviii
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what about the wheel/tire lifting off enough that the dsc thinks it slipping??? stiffer suspension. Or are we not seeing the actual dsc system? the rings around each wheel have sensors that see the revolutions of each wheel. Could one of the sensors be loose?
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