bigger wheels and ASC coming on?

[Cgarjeff]

I recently upgraded to 18X8 and 18X9 rims, now the Automatic Stability Control comes on intermittently. Any ideas or solutions?

[97alpineM3]

What year and model are you driving might help a little...

[Cgarjeff]

Sorry, I guess that would help...96 328is standard trans

[97alpineM3]

Does this only happen when your going around a turn? Or does it just happen to go on and off all the time?...

Do your wheels appear to have more negetive camber now that you changed them??

The only thing I can honestly think of that would trigger your ASC to fluctuate would be some type of obstruction on one wheel.... Do your rear wheels rub the fenders?... Does this happen only when you press the gas?

A lot of questions... sorry...

[Cgarjeff]

Its odd, its doesn't happen under hard cornering, but seems to happen under accelaration, and there are no wear marks on the tires(that I can see) I thought I saw a post somewhere about this happening and thought it might be electrically related, I.E. some sensor. I am replacing the shocks (95k miles) and I do have a broken left spring I discovered when I went to replace the shocks. That will be replaced tomorrow...

[97alpineM3]

That R&R of your rear suspension might actually fix your problem... if your rear tires are not full being forced on the road... the ASC will pick it up and try to fix it... thats what its there for..... hopefully that has something to do with it... if all else fails... take it to a dealer and have them look at it.... they could tell you more about it if it was a sensor or not... GOOD LUCK

[Cgarjeff]

Thanks for the help! I'll let you know...

[Cgarjeff]

Ok, so I replaced the springs and shocks and the ASC still comes on intermittently...There are no signs of the tires rubbing anywhere. any help?

[collin]

could just be the wiring....might check that out.

collin

[Cgarjeff]

I have a diagnostic tool and I get no codes...This didn't start happening until I put the bigger wheels on....Thanks though for offering suggestions..

[bitcore]

sensors need adjusting, apparently the front and rear axles arn't rotating at the same speed, according to the sensor. Is your tire diamater any larger? or is it the same with just larger wheels?

Try checking the speed sensor in the differential, it's the only wire coming out of it, maybe pull it out and take a look at it (could be messy, there's lubrication fluid in there, and you may have to drop the diff and disassemble it to get to the sensor, I honestly don't know) In the front, I'm not sure where the sensor(s) are.

[Cgarjeff]

I think that you're onto something...think its something the stealer can recalibrate? I'd hate to bring it there, pay $$ and have them tell me its the wheels and there's nothing I can do about it...by the way the front tires are 225/40/18 and the rears are 245/35/18...