Can you guys tell me if your Z does this?

mbowler

Ok guys. I have a small issue with the Z that is driving me up the wall. Dealership says this is normal and that they compared it to a new Z and that it's fine. My car has 7k miles on it btw and totally stock suspension, tires, etc.

If I'm driving on the highway and I make a gradual sweeping left turn and let go of the steering wheel the car will continue to turn left. The steering wheel does not straighten out unless the turn is more than "gradual" in which case it will "straighten" itself into a gradual left turn.

If I make the same gradual sweeping right turn and let go of the wheel, the car immediately straightens out, which is the behavior I would expect.

If I am driving straight the car might go straight or it might try to veer left, but it will NEVER try to veer right unless there is extreme road crown or bump that pulls me right. This behavior is MUCH more noticeable when it is cold. In the dead of winter on a 20 degree day after the car has been sitting it is downright PULLING left until something warms up.

Sometimes if I'm braking to a stop, and more consistently if the road is slightly bumpy, just a moment before the car comes completely to rest, the wheel will want to turn left quite a bit (1/4 turn or more). This never happens where it wants to turn to the right.

The effort to turn left is noticeably less than turning right. I'm not talking lock-to-lock turning, but the little left and right adjustments you might make to stay in a lane on the highway.

Visuallly, when driving the car straight, the majority of the time the steering wheel is turned to the left a few degrees (less than 10 degrees). This never happens where the wheel is turned to the right to maintain straight travel.

I've had the car in 3 times for this and every time I get the same story. "It's normal". "It's road crown". "It's aligned". When I got the car It did not feel this way. I hit a curb with the back wheel and replaced the back wheel and the lower swing arm, but it has never felt the same since. They even put it on an alignment rack and measured it and it aligns perfectly with the Nissan specs. I have the printout to prove it.

So guys, take you car for a spin and let me know if you have any similar behaviors. If you have any thoughts what it might be, I'm all ears.

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2012 PW 6MT Touring, Sport, Nav, Persimmon
Performance Clutch Helper Spring - K&N Panel Filters - Z1 Post MAF Tubes Appearance 3M Carbon Fiber Di-Noc Rear Diffuser - Dual Element Rear Foglight - GTR Ignition Button - Xpel Self-Healing Film - Optimum Opti-Coat 2.0 Audio/Visual Car Kit Co Bypass Kit

Garrett63

I notice the slight jerk left when slowing down sometimes, but I never think anything of it. I just figure its the uneven road. heck it could be just because more weight is on the left since you are driving it? I kind of came to expect this jerk and its easier for me to handle since I steer with my left hand only majority of the time so its like having leverage against the left jerk anyway.

As for the turning issue I cant tell you honestly lol. will have to pay attention next time I drive. Is it as severe as your making it sound or is it just a very minor annoyance?

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mbowler

It's noticeable. I don't let many people drive my car, but of the two people that i did let drive it, one of them had noticed the tendency to go left without me mentioning it and the other realized it after I mentioned it.

It's not severe as in I'm white-knuckling it to drive, but it's something that on a long drive get's frustrating because of the constant correction I'm doing.

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2012 PW 6MT Touring, Sport, Nav, Persimmon
Performance Clutch Helper Spring - K&N Panel Filters - Z1 Post MAF Tubes Appearance 3M Carbon Fiber Di-Noc Rear Diffuser - Dual Element Rear Foglight - GTR Ignition Button - Xpel Self-Healing Film - Optimum Opti-Coat 2.0 Audio/Visual Car Kit Co Bypass Kit

Bking

Have you tried bringing the car to a different shop?
Is the "new" back wheel weight balanced with other wheels?

kidkotic2001

I do notice the Jerk to the left when I hit the break hard or slow. I figured that was normal since it happened on my 350Z and I did the same as you took it to two different Nissan dealers. Both told me it was normal.

As for the other I have not noticed I will check today when I am driving home.

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ThAt WaS a CrAzY nIgHt

dP3NGU1N

I'll pay attention on my drive home tonight.

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35% Hooper Optik | Takeda Attack CAI | F.I. HFC | Hotchkis Sway Bar | Stillen 24row | OS Giken Super Lock LSD | TK Shift Knob | EVO-R Carbon Diffuser

Cmike2780

It could be an alignment problem or a power steering problem. Check the power steering fluid level just to make sure. If it is an issue with alignment, then the rear wheel you replaced needs to be looked at more carefully. It shouldn't do what you're describing, which is symptomatic of something out of alignment. How hard did you hit that curb? ....must have been pretty serious if you needed to replace the wheel and swing arm.

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[09][MB][6-Spd MT][Touring][Stillen Gen III][K&N][Borla CBE][Evo-R]

Haboob

Same here.

I don't recall anything like that happening, but I'll def. pay attention on the way home.

kenchan

here's how i check my tracking...

drive to my predetermined flat road. (minimal crown of road, no strong cross winds).

1. point car to go straight say 30-35mph. ideally your steering wheel would be pointing noon, but nothing to cry about if it isnt perfectly straight.

2. turn steering wheel slightly counter clockwise, then let go. if the car continues its path towards the left this is good.

3. then, center car, do the same but this time turn slighty clockwise, then let go. the car should continue its path towards the right. this is also good.

this means your toe angles are even and pretty much straight.

mbowler

Interesting. So you are saying that what I thought was correct (recentering if wheel slightly turned and wheel let go) is actually wrong. Do you have any information to backup your test?

If my car doesn't continue to track right but instead straightens out, what does this mean in this case? That my toe angle is off?

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2012 PW 6MT Touring, Sport, Nav, Persimmon
Performance Clutch Helper Spring - K&N Panel Filters - Z1 Post MAF Tubes Appearance 3M Carbon Fiber Di-Noc Rear Diffuser - Dual Element Rear Foglight - GTR Ignition Button - Xpel Self-Healing Film - Optimum Opti-Coat 2.0 Audio/Visual Car Kit Co Bypass Kit

my2004Z

A lot of tests that people come up with are based on certain assumptions. Things like consistent tread depth on all tires, same brake pad thicknesses, rims/tires balanced, good alignment etc. You might want to share anything that is quirky or inconsistent with your Z due to the curbing incident.

Haboob

If you look, there's nothing binding or possible wrapped around anything?

Fountainhead

You could do an old school trick and wet the pavement, drive through it and make sure your treads all line up with the wet tread lines following each other exiting the puddle?
I've never done this but if your alignment is OK then I guess frame is OK.

mbowler

Brakes, tires, etc all fine from curbing incident. I actually posted about it on the site here. No other quirks.

The wheel looked like crap and was slightly bent so I replaced it with a reman. The dealer did the balancing, etc. The swing arm was bent because they are made out of aluminum. I could have bent it with a few good whacks of the hammer.

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2012 PW 6MT Touring, Sport, Nav, Persimmon
Performance Clutch Helper Spring - K&N Panel Filters - Z1 Post MAF Tubes Appearance 3M Carbon Fiber Di-Noc Rear Diffuser - Dual Element Rear Foglight - GTR Ignition Button - Xpel Self-Healing Film - Optimum Opti-Coat 2.0 Audio/Visual Car Kit Co Bypass Kit

mbowler

Car is at dealer right now so I can't look, but they've had it on the rack several times and even loosened/re-tightened front and rear suspension. I would assume that they probably would have seen this.

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2012 PW 6MT Touring, Sport, Nav, Persimmon
Performance Clutch Helper Spring - K&N Panel Filters - Z1 Post MAF Tubes Appearance 3M Carbon Fiber Di-Noc Rear Diffuser - Dual Element Rear Foglight - GTR Ignition Button - Xpel Self-Healing Film - Optimum Opti-Coat 2.0 Audio/Visual Car Kit Co Bypass Kit