Most bizarre thing happen to me today! Unable to Rev past 2500 RPM!
 

Okay.. this happened 20 minutes ago. I'm leaving this big supermarket. I was slowly driving in the supermarket market lot (I'm leaving now) and came to a stop. My car was in 2nd gear (I guess I kinda forgot to change to 1st). I am waiting for this guy to pass and then I'll go but instead I get the "wave" meaning he wants me to go. So, I wave back and kinda gas the engine a little and keep moving. When I pressed the gas pedal, I heard the "clunk"/"weird clutch/gear noise" and I didn't think too much of it. I thought since I was in 2nd gear, that's why there was the noise for. Now I'm waiting at a red light (please note I haven't driven my car yet fully. From stop sign to the lights maybe 200 ft. I haven't revved the car past 2000 RPM yet).

Light turns green, I drive off. I can't REV the engine past 2500 RPM! WTF! :wtf: I started rowing through the gears because I have to keep moving yet I can't go above 2500! Fortunately, I had the camera in my car and I was able to take a video. Take a look at the video



I only live about a mile away from the supermarket. I come home. At this point, I'm very angry and confused at the same time. Angry because I have to call my local Nissan dealer and ask them to tow my car to their dealership. I not too fond of this dealer to begin with hence I DIDN'T bought the car from them. Before placing the phone call, I turn the car off and on again. Problem still there :(. I do this few times. At this point, I'm frustated and decided I'll go home and call them from my house phone. So, I BACK MY CAR up by putting the car in REVERSE . Now, just to check for the last time, I put the car in 1st and rev it, IT REVS! :D So, I take the car out for a spin and it's revving fine.

I have no clue what just happened. Could this be a electrical glitch? I don't know because turning the ignition on/off didn't help. Could this be a gearing issue? Possible. Reverse gear seemed to fix the issue. What do you guys think? Didn't we had a few threads where member(s) couldn't rev past 3500 and shutting the car off solved the problem?

Can you duplicate it again? Or has it fixed it self from the reverse?
All I can think of is something wrong with the ecu

Do you have a tune?

It was fixed when I put the gear into reverse and reversed the car a little bit. I don't think I can duplicate it again but if I do I'll keep you posted.

NO Tune. Stock ECU.

Unplug the battery for a few minutes and try to rev it again.


EDIT: try to reset the ecu next time

Sounds like an ecu glitch. Almost as if a valet map got loaded in by accident or something. Very strange.

First thing that came to mind was cobb valet map

:iagree::tiphat:

So, it looks like the only thing unusual is that AK started off in 2nd instead of 1st? I wonder if he (or anyone else) would be able to replicate the problem by simply starting off the line in 2nd.

I don't think you can hear in the video clearly, but it wasn't a smooth rev at all! When I was hitting the limiter at 2500, it was a vibrantly shaky gluck-gluck-gluck noise. It felt like something went really bad in gear/clutch mechanism. But I was surprised that it was fixed automatically 5 minutes later when I reversed it. :confused:

It does look like your odometer lights are flashing too

lol.. no that's the camera. If you try to take video of your computer monitor, it'll flash too. Something to do with refresh rates and camera lens. :tiphat:

You reversed the problem....... Corny joke... Yes

The N in the center gear indicator and the display on the left are flickering as well. But I wonder if that's just due to the video camera.

Edit: never mind, AK beat me to it. lol

That happened to me once in my G but my VDC light was flashing as well. Turning the car off and then on again fixed the problem. I chalked it up as a glitch and it has never happened again in 35K miles.

like limp mode?

Yes, exactly.

if so, shut off the engine and restart, no?

go to the dealer and have them scan for error codes. it could be a sensor failing or something causing some kind of engine protection mode.

AK said he tried that and it didn't fix the problem.

That's pretty scary, so whatever that clunk was in 2nd gear caused the car to behave weird? Did you try turning SRM off?

It was like a clunk/weird clutch release noise. Def distinctive. I didn't try the SRM off. It is scary. I am scared to open up my RPM now. I'll keep it calm today as I have to go somewhere. Tomorrow, I'll be doing some Wide Open Throttle runs :) and let you guys know if everything is okay or no.

ECU enabled Limp Mode, but who knows what caused it...Probably a glitch.

oh... sorry, i skimmed too fast. unless it kept limping and got a MIL i would not worry about it. :tup:

Scary... so is this an excuse to switch to Redline? :) There are a couple of things I notice with the 370Z compared to the 350Z. The clunk is definitely there, but not as bad. I'm under 8k miles, and the clunk and notch is not as bad. The noise is still there. I was being dumb one day giving it too much gas while feathering 2nd (climbing), and the clutch started to shudder in 1st gear for a couple of days before going away.

Let's hope it's not something bad like being stuck in gear even though the stick is in neutral. :eek:

not sure if you guys get winterized gas in your area, but this time of year with the winterized gas and drier colder air, the car sometimes acts funny (ecu).

sometimes acts even funnier if you have aftermarket bits...

i had that same thing happen to me pulling out of a parking lot a work...

every stop light i came to i turned off the car then started it again, don know if that corrected it but after the third time of restarting the rpm issue misteriously went away, and z ran normally after that...

this happened very shortly after i put the takedas on so i always associated it with the ecu relearning the sri...

I think you hit limp mode by starting from a dead stop in other gears instead of 1st. Why I know this? Because it happens to me before, on the G37.

Long story short, backing out of the parking lot, I accidentally put the car in 6th gear instead of reverse (stupid me, I thought I pressed down enough on the shifter to get over to reverse. Fist time driving the G37 doesn't help.) It made the same sound as you describe. I noticed it right away and put it back in reverse. After, I could not get the rpm over 2.5k no matter what gear I was in. This scared me. I turned it off and start right back up again, but that didn't help. So, I turned it off and left it off for a little longer, then turned it back on again. Problem solved.

Thanks for your input.



I can def relate to that. Thank you for posting this. I did the almost the same thing. I kinda punched the gas pretty quick thinking I was in 1st but I was really in 2nd. Any issues afterward?

I see a common denominator. The car will not allow you to over rev in a higher gear from a stop and smoke the clutch. :tup: Case closed ;) Now its time for someone to go out and try it to disprove the theory. Any takers?

i nominate you! :ugh2:

Yeah I would scan it to be safe, but it seems like it went in to limp mode.

Regardless driving the car would be fine, nothing that would need a tow.

It makes it so you cannot rev it high, but 2500 should be enough to drive it around.

had this happen to me once out of the blue, freaked me out since I had less that 2000 miles on her at the time. Turned off the motor and restarted and it went away and didn't happen again...for now.

No issues at all. Never noticed any different after that. :tup:

why would the car hit limp mode if starting from a wrong gear? what's the purpose that would make the engineers program such a feature?

Its not a programmed feature.

Ok.. just got done driving the car for more than half an hour. I made a new friend and it's the Rev Limiter ;). I took the car to 7000+ RPM few times, quick downshift 5-4-3, thrashed it around and EVERYTHING is FINE! It's running perfectly.

I have no clue why this happened. Looks like few others has encountered the same problem. For some, it's solved by shutting the car off and restarting. For me, it was putting the car in reverse (which makes me lean more convinced that my issue was a gear/clutch issue).

Good thing is car is running 100% with no issues! :tup:

Glad to hear everything is running normally, AK.

As someone else commented, I would have the dealer check the codes to see if anything comes up. Otherwise, drive, baby, drive. :driving:

Moral of the story: The more electronics that get engineered into a vehicle, the more unexplained "it was a vibrantly shaky gluck-gluck-gluck noise" issues to be had. :ugh2:

Sounds good you didn't have anymore issues... but something that may be related.

Is anyone hearing 3 clacking sounds on startup as if it is coming from the clutch? It's sorta like the sound when you're about to bog down your car, but this is with engine start.