ok so im running the coupe 19s and in the front it came with 235/35/19 and same in the rears. so i decided to put on bigger tires in the back 255/40/19 and now i get the abs/vdc/slip light on. whats going on? is it becuz of the bigger tires in the back? everything is topped off in fluids.

 

your sizing is really messed up....rear way too tall...and front too short. as a result....your vdc is thrown off.....sorry but youneed proper sizing and should have researched. get 255.35.19 and 235.40.19 if you wanna keep those widths

 

225 40 19 - 26.1 overall diameter (stock)
235 35 19 - 25.5 overall diameter

245 40 19 - 26.7 overall diameter (stock)
255 40 19 - 27.0 overall diameter

and there's your problem

 

See the 'Tires on coupe 19s end-all thread' or whatever it's called.

 

I'm surprised you're not rubbing in the rear with 255/40/19.

The most cost effective/best way to fix your setup now....is to get 245/40/19s for the front, keep the 255/40/19 (if they're not rubbing). Basically...you get rid of the 235/35/19 all together.

 

ya your computer is freaking out because the wheels are spinning at the same speed like when you put your car on a dyno it freaks out because the fronts are not spinning and only the rears are so it thinks something is wrong like your car isnt in control

 

It's not so much that your fronts are too small or your rears are too big, it's the combination that's throwing off the VDC. You need to either get bigger fronts or smaller rears, but since the current rears are closer to stock diameter than the fronts, you'd be better off replacing the fronts (plus they'll be cheaper).

 

thanks guys, after all this headache i've decided to just buy the stock sizes all 4. I'am rubbing a bit with the 255 so ill just go back to stock sizes.