I've had the car for a little over a month and have about 1600 miles on it. I've just started to push it after break-in and I noticed this for the first time yesterday going onto an on-ramp. I have the base model, no sports package, no sync rev, so that takes out sync rev as the culprit.

I was approaching the on ramp pretty fast in 3rd, I rev-matched and put it into second at about 4k rmp (possibly higher), the car was in gear before I took the turn and noticed it's not engine breaking for s***! I almost went into the f'ing curb and if I wasn't somewhat experienced I probably would have.

This being a heavy flywheel issue SOMEWHAT makes sense from the way it felt. Like the flywheel was spinning and because it's heavy its momentum kept carrying the gear? F! I don't f'in know. :mad:

That's it. I would suspect quite a few people have it, they just haven't put the car into the situation. Please take it to the dealer, so there are more complaints to the problem. They supposedly give a case number by customer name (pm me if you want my name to reference). Obviously, they haven't come back with a solution yet.

This is a cause of major concern for me as I was planning on picking a Z this weekend. Do you guys feel that the issues you are seeing are an isolated problem (lemon vehicle) or a general engineering problem that all cars have? Someone in this thread mentioned that this is happening to
their 1 month old car, which I presume is a 2010.

The issue has gone on record with Nissan, as mentioned by one of the posting members in this thread. Given the advent of the Toyota's issues, it is (hopefully) unlikely that Nissan will not act on this if it is a problem. The final decision of buying the Z is up to you. You will be getting a lot of automobile for your money if you buy one.

All vehicles have issues, and all manufacturers address them in different ways. This issue sounds serious enough to warrant Nissan doing something as the car is not entering into a limp mode in what Nissan is essentially saying is a fail-safe measure—it is doing something out of the ordinary (unless, Nissan states that engine braking is not ordinary...pretty damn hard to do in the enthusiast world).

Rep point to speedworks!

Yeah I only had it happen during Auto-x. I'll try to replicate somewhere safe since the car is going to Korea with me. If there is something Nissan could do I would like to get it done before then.

why would the problem only happen on turns? how would g forces affect the throttling system? do the cars even have g sensors? if so they'd tie in with vdc. but vdc only cuts engine power, not increase it.

Can't answer this question. I did get the impression from the service manager that Nissan engineering kind of already knew of the issue, and that it was related to the ecu program (which I believe). I used to own an SVT Focus when I worked for Ford, I was able to work with the SVT engineers to diagnose an issue with the throttle map (it would surge at constant cruising speeds) - it took them some time then to develop a new map for the ecu. So much electronics in these things, this issue doesn't surprise me. As for the other person above concerned about buying the car - all cars have issues, and my guess is most people won't be putting their cars in this situation that often (unless you drive close to the limit on turns). It bothers me when I feel it, but I now can predict it. I just look forward to the fix - ecu update is my guess.

still doesn't answer why it only happens on turns. are there any g force sensors or sensors for steering angle or yaw?

I'll take it in to the dealer as soon as I get a chance...I'll let you know what they say.

Pharmacist, do you have a bigger pic of your avatar?

Shades of Toyota...

Imagine with all the areas of the car a computer has control if Microsoft did the software design for it !

As to saying it might not affect a lot of people because a lot of people don't drive that hard, it's when a car is being driven hard that a computer logic fault is at its most dangerous point !

Nissan needs to take these things seriously and NOT "Toyota-Up" :mad:

That's why my first sentence says I can't answer that.

The Toyota syndrome keeps spreading...

This is a question not a comment: When you match the revs when you down shift either with SRM or manually, would that reduce some of the engine braking?

I'm not exactly sure what you are asking, but if you downshift, and match the revs, yes 'engine braking' will occur. If you don't exactly match it, and maybe release the clutch at a lower rpm, then you will get that jerk feeling, and a little more initial 'engine braking' until the engine/rpms catch up to the proper rpm for that gear, and then you get the normal amount of 'engine braking'. Does that answer it?