t3dcf Posted October 1, 2006 Posted October 1, 2006 Not sure if this is the correct place for this...but not sure where to put it. Im looking for some help- I recently bought some 18's for the z, all on and beautiful. however im now having a bit of a problem, im not sure if its connected or not - not actually sure how it could be...but here goes. I have a jdm tiptronic, and not sure if uk cars have it but I have a little light that flashes "slip" when the rear wheels loose traction. All good so far. recently this light has been flashing on during normal driving and i have lost all drive and push from the rear wheels - however the wheels are not slipping its as if the car is just not pushing. it returns to normal soon, but i normally have to touch my breaks first. my thoughts were maybe the tyres were new and not gripping, but they are not spining or slipping, then my thoughts went to clutch? any ideas would be appreciated. D p.s Hope this makes sense? Quote
Rob_Quads Posted October 1, 2006 Posted October 1, 2006 Have you kept the wheels total size the same as the standards. The ratio between front and back needs to be maintained when you put after market wheels on otherwise the computer gets confused and would do exactly as you described Quote
M13KYF Posted October 1, 2006 Posted October 1, 2006 yeah isn't there something about rolling the car back and forwards to reset the settings Quote
t3dcf Posted October 1, 2006 Author Posted October 1, 2006 I think they are the same overall size? not sure though. whats this about rolling back etc, i seem to remember reading something - any more info? Quote
M13KYF Posted October 1, 2006 Posted October 1, 2006 true they should be overall the same size otherwise the speedo would be messed up. Cant quite remember where and what the post was about. It may be wroth resetting the ECU though Quote
M13KYF Posted October 1, 2006 Posted October 1, 2006 guie for resetting ECU is here http://www.350z-uk.com/forum/viewtopic.php?t=89 Quote
t3dcf Posted October 1, 2006 Author Posted October 1, 2006 Thanks - gonna keep searching for the post re moving the car backwards etc as not overly keen on resetting ecu just yet. The search continues............... Quote
lomoto Posted October 1, 2006 Posted October 1, 2006 Thanks - gonna keep searching for the post re moving the car backwards etc as not overly keen on resetting ecu just yet. The search continues............... have you checked tyre sizes yet..post em up what you have fitted Quote
M13KYF Posted October 1, 2006 Posted October 1, 2006 not found the link yet but seem to remember it was about re calibrating speedo if wheel size has changed. So prob wont help. TBH not sure how resetting the ECU is linked to the traction control. Quote
t3dcf Posted October 1, 2006 Author Posted October 1, 2006 Just checked.... REARS: 265, 35, 18 FRONT: 235, 40, 18. Thoughts? Quote
M13KYF Posted October 1, 2006 Posted October 1, 2006 rears should be 245,45, 18 this is where the prob lies Quote
lomoto Posted October 1, 2006 Posted October 1, 2006 Just checked....REARS: 265, 35, 18 FRONT: 235, 40, 18. Thoughts? Yep thats your problem Quote
M13KYF Posted October 1, 2006 Posted October 1, 2006 also your fronts are the wrong size. should be 225,45.18 this is goiing by what the standard 18" wheels are. Quote
t3dcf Posted October 1, 2006 Author Posted October 1, 2006 so apart from getting new tyres? what can i do? Quote
M13KYF Posted October 1, 2006 Posted October 1, 2006 can't help on that one and not sure if anything can be done. The traction control has been calibrated for Nissan specs. Your tyres are outside this. May be someone else can help. Did you buy the wheels with the tyres on? Quote
lomoto Posted October 1, 2006 Posted October 1, 2006 so apart from getting new tyres? what can i do? not familiar with the auto box on the Zed ,can you switch the traction control off manually?? Quote
Rob_Quads Posted October 1, 2006 Posted October 1, 2006 Your new wheels are... Fronts are 25mm bigger in diameter - 5.2% Smaller Rears are 15mm bigger in diameter - 2.2% Smaller Standard Ratio = 1:1.02 Your Ratio = 1:0.99 Looking at it your problem is the fact your rear wheels are smaller than the fronts. This is likely to screw things up. Quote
t3dcf Posted October 1, 2006 Author Posted October 1, 2006 Thanks for your help - dont think i can turn the traction control off? the only switch I have is the main traction control switch and im not really brave enough to turn this off!! Guess all i can do is switch the tyre sizes when i next get new tyres. Which size should i go for? I might go back to the place i bought the rims and explain whats going on - what should i say...I dont really understand the ratio's etc etc. Quote
lomoto Posted October 1, 2006 Posted October 1, 2006 Thanks for your help - dont think i can turn the traction control off? the only switch I have is the main traction control switch and im not really brave enough to turn this off!! Guess all i can do is switch the tyre sizes when i next get new tyres. Which size should i go for? I might go back to the place i bought the rims and explain whats going on - what should i say...I dont really understand the ratio's etc etc. turn the bugger off , it wont bite you , I run with mine switched off most of the time! in this way it will show if the problem is the tyres or something else Quote
t3dcf Posted October 1, 2006 Author Posted October 1, 2006 Although slightly scary - alot of fun, I have managed to have some sideways time even with it on! just being careful after a friend managed to put his s2000 into a 360 spin on the motorway! You do however have a good point about seeing if it is the tyres of something else?. Guess i will give it a try. Quote
lomoto Posted October 1, 2006 Posted October 1, 2006 Although slightly scary - alot of fun, I have managed to have some sideways time even with it on! just being careful after a friend managed to put his s2000 into a 360 spin on the motorway! You do however have a good point about seeing if it is the tyres of something else?. Guess i will give it a try. keep us informed Quote
M13KYF Posted October 2, 2006 Posted October 2, 2006 Thanks for your help - dont think i can turn the traction control off? the only switch I have is the main traction control switch and im not really brave enough to turn this off!! Guess all i can do is switch the tyre sizes when i next get new tyres. Which size should i go for? I might go back to the place i bought the rims and explain whats going on - what should i say...I dont really understand the ratio's etc etc. I'd defo go back. You've been sold wheels out of spec. Not very responsible of the seller Quote
Rob_Quads Posted October 2, 2006 Posted October 2, 2006 turn the bugger off , it wont bite you , I run with mine switched off most of the time! in this way it will show if the problem is the tyres or something else You won't be saying that when hes wiped out a row of cars due to the back end spinning up. I would not think of turning off ESP on the public road. IMO its best left for when you are playing on an track or airfield. Quote
lomoto Posted October 2, 2006 Posted October 2, 2006 turn the bugger off , it wont bite you , I run with mine switched off most of the time! in this way it will show if the problem is the tyres or something else You won't be saying that when hes wiped out a row of cars due to the back end spinning up. I would not think of turning off ESP on the public road. IMO its best left for when you are playing on an track or airfield. God how did we manage drive before traction control was invented???? Quote
Rob_Quads Posted October 2, 2006 Posted October 2, 2006 By driving over careful. When you have all that power I would much rather drive it as hard as i can and let the traction control handle it if it goes belly up rather than drive it below the potnetial Quote
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.