easyas1_2_350Z

iTrader: (3)

Quiz time friends. ok so long story short: my ABS, VDC, and SLIP light all turned on simultaneously. ALSO after 3K RPM my car seems to be going a lot slower in all gears.

My question is this: What are all the possible things that could be wrong according to these warning lights and malfunction?
I dont want to take it to a stealership and them tell me that the excessive modding has made the car a disabled transformer or some BS, and charge me both arms and lefty to fix it.

Also i jus had my rear tires changed only. I am hoping that would be the problem with the warning lights.
P.S. they do turn off after i restart the car, but turn back on after gunning my car.

ALL HELP IS VERY MUCH APPRECIATED!!

andrew538

might because
1. Weak throttle circuit.
2. mass airflow censor failure or weak circuit
3. something to do with the ecu
all I can say is not the tires, if your tires r wore out big time like mine, u can feel it while high speed turns and VDC/Slip will kick in.. not regular driving in every gear.

MeetJoeAsian

I had a problem awhile back...not exactly like yours, but may be similar...here is the thread I wrote:

https://my350z.com/forum/maintenance-and-repair/242364-anyone-had-this-happen-already.html

davidv

iTrader: (2)

What size tires are you running front and rear?

alcheng

Have you change your tires recently? If so, is there change in the tire-size??

Changing the size of the tires can confuse the sensor for the ABS, VDC and traction control.

If you have change the size of the tire, make sure the size is correct according the VDC setting from the manufacture.

If you have changed tires but you sure the size are the right "size" for the car, then go and check the printing on the sidewall, make sure the tire mechanic haven't put on the wrong size on left and right by mistake.

It happened to my previous BMW, assume all four are the same size, but they put one as 60 instead of 55, and it screwed up the traction control badly, can't go over 80km/h at all cos the traction control keeps kicking in.

So, before you suspect it's a complicate issue, check the tires.

md350

Its very likely because of the tires, size change was too big or small.

You'll need to get new tires that are the correct size. And about the throttle - yes, it will cut throttle consistently because of the size difference. You can turn VDC off for now, it will stop the ABS/VDC/SLIP/throttle cut...but if the car has a problem with the size, its probably not the best to be running on.

andrew538

I don't think is the tires, I had that problem before I change my rims... always got the same size tires, just diffrent brands... If u order different size tires or the shop installed different size tires(2 tires spec differs in front, or rear), man...., how did that happen? I don't think u switch to 15" rims or 22s on ur Z right? or did u get tires that cost $50 a peice? I doubt it... Anyway, good luck finding that damn problem, so u can start enjoying driving!

easyas1_2_350Z

iTrader: (3)

thanks guys
yea i just got new tires 2 weeks ago but only on my rears for now. Thats all i had time for. I read some threads about the tire size difference thing but my tires are the correct size.
The only thing i could think of is that since the front tires are worn out and the rears have thick fresh thread, that tripped the sensor??
I just tried driving it this morning and gunned but no problems for a while of driving so hopefully it stays that way...

easyas1_2_350Z

iTrader: (3)

im running stock potenza 225/45/18s on the front (worn like no other) and brand new FK 452 245/45/18s in the rear