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-   -   Why Did My Z, Keep Revving? Video. (http://www.the370z.com/nissan-370z-general-discussions/13824-why-did-my-z-keep-revving-video.html)

TheWeatherman 01-28-2010 06:59 PM

Why Did My Z, Keep Revving? Video.
 
I've tried to tell a lot of you that I've been having a lot of problems with my 2009 370Z and my 2009 Infiniti FX. While my FX is in the shop for the 3rd week getting it's dashboard ripped apart... (Video on my channel) I took the Z back out since the roads have been dry in Wisconsin.


I felt like I was driving a Toyota with the accelerator stuck. I first noticed it when I was coming off the highway to an intersection. My car would not slow down without hard braking. Come to find out, when I came to a stop, it would just start revving up. The video is further proof that I'm not making things up. I didn't touch that gas pedal. It would really bake my clutch when I'd go to take off. Was the accelerator stuck? You tell me. My floor mat wasn't even close to the gas pedal. I checked it over and over. I even pulled it back 2" to make sure. I'm having some really bad luck with these cars.

YouTube - Nissan 370Z Revs in Cold

My broken Infiniti Nav video is here...

YouTube - 2009 Infiniti FX35 Nav Screen Broken

marcussoori 01-28-2010 07:06 PM

Perhaps you are cursed due to being a weatherman? jk :) Have you had the car/SUV at the dealer enough times in the required period to qualify as a lemon?

Good luck with everything, and let us know how it turns out...

TheWeatherman 01-28-2010 07:27 PM

This is Unreal...
 
Yeah, call it a curse. Who made Nissan's throttle? Is it CTS? My car wouldn't stop revving! Is it a Toyota?

TheWeatherman 01-28-2010 07:30 PM

370Z Stuck Throttle? Video...
 
**

Modshack 01-28-2010 07:48 PM

Try re-booting the car (battery disconnect for a few minutes)

TheWeatherman 01-28-2010 08:09 PM

Quote:

Originally Posted by Modshack (Post 379034)
Try re-booting the car (battery disconnect for a few minutes)

I actually shut the car off twice at two different intersections. Restarted, same thing. I know, I should reconnect the battery, but really ModShack? Why would it do this to me in the first place? What if I had an automatic? At least I have the luxury of pushing the clutch in. Torque converters? Good luck. I pulled hard with the brake on. I do respect your comment, but by the time at at each intersection, it's too late. I don't have the tools to get out and pull off a battery teminal to fix it while I'm sitting at a stoplight.

m4a1mustang 01-28-2010 08:15 PM

You need to reset it anyways... just go out and do it now. The system might just need a hard restart and that could clear your issue.

If not, I would take the car to the dealership and show them these videos.

This is a potential safety issue, so I don't think they would send you off without a fix. The throttle assembly needs to be inspected (could be an issue with the hardware there) and the ECU needs to be checked... maybe a software glitch. Either way, you need to take it in and demand they fix it!

Complaining definitely isn't going to help any... take it in! If I was your service manager I would assure you we would not give you the car back until we resolved the issue... and I'd make sure you had a loaded loaner car provided free of charge for as long as it took to repair!

AK370Z 01-28-2010 08:41 PM

Sorry to hear it. Quick question, if you take the car off the "S Mode", can you replicate such behavior?

DooDooBrown 01-28-2010 08:46 PM

That was the Z saying "Its too damn cold out for this sh#t!! Get me back home!"

TheWeatherman 01-28-2010 08:47 PM

Quote:

Originally Posted by AK370Z (Post 379125)
Sorry to hear it. Quick question, if you take the car off the "S Mode", can you replicate such behavior?

Since it was in neutral with the car stopped, I don't think the S mode would change anything. If the car's not moving, SynchroRev shouldn't do anything. It's just a guess, but either way. If I'm walking out of the car, it should idle. It was in neutral.

SynchroRev was the only thing that helped me.

370zdub 01-28-2010 08:54 PM

Wow, Thats a bad run. My mom has a 2009 Fx35 and I have my 370 and both have been flawless cars, even here in the Utah cold.

I would take it to the nissan dealership or if you have the ability inspect the cables actuating the throttle, there is a possibility that water got in them and froze causing them to stick open. But its just a guess.

Modshack 01-28-2010 09:43 PM

Quote:

Originally Posted by TheWeatherman (Post 379068)
I don't have the tools to get out and pull off a battery teminal to fix it while I'm sitting at a stoplight.

Quote:

Originally Posted by m4a1mustang (Post 379083)
You need to reset it anyways... just go out and do it now. The system might just need a hard restart and that could clear your issue.

Ummm....I didn't mean do it in the middle of an intersection. Do it at home tonight. The only way to clear the memory and a potential Computer scramble is to power down the car (not just tun it off). If it doesn't recover, get it to the dealer as advised above..

Modshack 01-28-2010 09:46 PM

Quote:

Originally Posted by 370zdub (Post 379150)
I would take it to the nissan dealership or if you have the ability inspect the cables actuating the throttle, there is a possibility that water got in them and froze causing them to stick open. But its just a guess.


It's "drive by wire" so no cabes involved. Totally electronic. The VVEL also does a lot of throttling on the car, not just the throttle bodies. Several potential areas that could be causing this.. If a re-set doesn't do it, the dealers diagnostic machine will certainly pinpoint the fault.

m4a1mustang 01-28-2010 09:55 PM

Quote:

Originally Posted by Modshack (Post 379221)
Ummm....I didn't mean do it in the middle of an intersection. Do it at home tonight. The only way to clear the memory and a potential Computer scramble is to power down the car (not just tun it off). If it doesn't recover, get it to the dealer as advised above..

I didn't either. I said go out now... assuming he's on the boards at home, not in the middle of an intersection.

If you weren't implicating that I suggested a bat disco in the intersection then I just was confused by the double quote. :tiphat:

spearfish25 01-28-2010 10:06 PM

You have a Yaris in wolf's clothing...

Modshack 01-28-2010 10:21 PM

Quote:

Originally Posted by m4a1mustang (Post 379235)
If you weren't implicating that I suggested a bat disco in the intersection then I just was confused by the double quote. :tiphat:

No worries...I was using you to reinforce my post! Sometimes it takes a little reinforcement to get the point across.......:tup:

m4a1mustang 01-28-2010 10:27 PM

Quote:

Originally Posted by Modshack (Post 379262)
No worries...I was using you to reinforce my post! Sometimes it takes a little reinforcement to get the point across.......:tup:

No prob! I was confused by the double-quote response. Ah... interweb forum technicalities! :hello:

370zdub 01-28-2010 11:07 PM

Quote:

Originally Posted by Modshack (Post 379224)
It's "drive by wire" so no cabes involved. Totally electronic. The VVEL also does a lot of throttling on the car, not just the throttle bodies. Several potential areas that could be causing this.. If a re-set doesn't do it, the dealers diagnostic machine will certainly pinpoint the fault.

I know its drive by wire I just didn't know if there was some cables controlling intake functions. Your response clears that up enough though! Thanks

MeetJoeAsian 01-29-2010 12:39 AM

Is it a stuck pedal like Toyota? Best way to find out is let it replicate again, and then try to pull/lift up the accel. pedal...if you find that it stops revving when you pull the pedal up, then it's a stuck pedal...however, it seems it maybe a motor issue since when you put it in gear, it doesn't rev at all...


...and also, does your MPG really read 23.7??? and with a little over half a tank left, your DTE reads 231 miles???

IDZRVIT 01-29-2010 07:08 AM

Your ECU has gremlins.

HKYStormFront 01-29-2010 07:45 AM

forgive a "dumb question"... just out of curiousity was the car warmed up to normal operating temp when it was doing this?

IDZRVIT 01-29-2010 07:51 AM

The oil temp looked low.

bullitt5897 01-29-2010 07:57 AM

TheWeatherman,

I know for a fact why your 370z seems like it is continuing to rev...

Here is why:

first of all you are in sport mode which enables synchro rev match. Secondly you pulled the transmission out of gear and left it in neutral from 5th gear. The way synchro rev match works is that it anticipates your next gear so for instance if I were to shift from 5th to 4th it would rev for 4th gear's rpms. Now SRM (synchro rev match) only revs when in neutral or at the gate of the next lowest gear. That is your problem... well not a problem just a lil uneducated on the feature. If this bothers you turn off your SRM by pushing the sport button until the little S disappears from your gear indicator. This has nothing to do with your car being warm. Now if you want to try it again leave it in gear this time and just clutch it... I bet you it wont do the rev climb.

So in final your Z is perfectly normal... so stop babying it and drive it like a big boy :tup:

semtex 01-29-2010 08:32 AM

^ That's a pretty astute observation, Mike! TW, do you in fact always go from a high gear directly into N? You may not, but we can only go by what's in the video, so . . .

Tyrell Tyson 01-29-2010 08:50 AM

Quote:

Originally Posted by bullitt5897 (Post 379494)
TheWeatherman,

I know for a fact why your 370z seems like it is continuing to rev...

Here is why:

first of all you are in sport mode which enables synchro rev match. Secondly you pulled the transmission out of gear and left it in neutral from 5th gear. The way synchro rev match works is that it anticipates your next gear so for instance if I were to shift from 5th to 4th it would rev for 4th gear's rpms. Now SRM (synchro rev match) only revs when in neutral or at the gate of the next lowest gear. That is your problem... well not a problem just a lil uneducated on the feature. If this bothers you turn off your SRM by pushing the sport button until the little S disappears from your gear indicator. This has nothing to do with your car being warm. Now if you want to try it again leave it in gear this time and just clutch it... I bet you it wont do the rev climb.

So in final your Z is perfectly normal... so stop babying it and drive it like a big boy :tup:

If you are right i will donkey punch myself right in the balls

- Ty

Modshack 01-29-2010 08:59 AM

Quote:

Originally Posted by bullitt5897 (Post 379494)
first of all you are in sport mode which enables synchro rev match. Secondly you pulled the transmission out of gear and left it in neutral from 5th gear. The way synchro rev match works is that it anticipates your next gear so for instance if I were to shift from 5th to 4th it would rev for 4th gear's rpms.

I'm kinda doubting that diagnosis, with one exception: The cold...

First, the Syncro rev match doesn't anticipate anything. It is purely analog in that Microswitches in the gate are triggered depending on what gear you intend to enter. You can actually feel the point of switch engagement when you move the stick and the revs go up...The only way this could happen as in the video would be if the Microswitches were sticking because of the cold......However, a shift to neutral should not have triggered them at all unless it was a sloppy shift and bumped against the switch engagement point.

m4a1mustang 01-29-2010 08:59 AM

Quote:

Originally Posted by semtex (Post 379512)
^ That's a pretty astute observation, Mike! TW, do you in fact always go from a high gear directly into N? You may not, but we can only go by what's in the video, so . . .

I didn't really think of the SRM being the source of the issue because I have never had it do any of this lazy rev stuff. Usually if I pop out of gear to coast to a stop the RPMs will just drop unless I really act like I'm goign to engage a lower gear... and then it's an aggressive blip.

m4a1mustang 01-29-2010 09:03 AM

Quote:

Originally Posted by Modshack (Post 379529)
I'm kinda doubting that diagnosis, with one exception: The cold...

First, the Syncro rev match doesn't anticipate anything. It is purely analog in that Microswitches in the gate are triggered depending on what gear you intend to enter. You can actually feel the point of switch engagement when you move the stick and the revs go up...The only way this could happen as in the video would be if the Microswitches were sticking because of the cold......However, a shift to neutral should not have triggered them at all unless it was a sloppy shift and bumped against the switch engagement point.

Yup. And if he did trigger the switch the revs would blip higher.

I don't really think SRM is the cause here. The OP needs to disconnect the battery to reset the ECU, then see if he runs into the same issue again. If he does... take it in for warranty service.

TheWeatherman 01-29-2010 09:09 AM

I really believe it had nothing to do with the SRM. When the car was stopped, idling, it still idled at around 3,500 RPM. SRM only is effective when the car is in motion. It uses speed and gear position to find it's rev point. If I'm stopped and outside of the car, it shouldn't be revving at 3,500 RPM.

As far as the temperature, when it's this cold, the oil temperatures reflect that. It was in it's normal operating temperature for this ambient temperature. If you drive your car when it's 0-10 degrees down the highway, you'll notice your oil temp will be between 170°-190°F. That's where mine was. Car was out and about for at least 25 minutes when the video was taken. I don't have an oil cooler.

I don't always drop to neutral. When I was coming off of the highway to a stoplight, the car was actually speeding up. I was hitting the brakes in 6th trying to come down from 60MPH when I noticed something was wrong. Hence, nothing to do with SRM. Try it in your car. Go cruising around the city, pop it in neutral, put the stick right in the middle of the gate, don't touch the shifter, and the revs should drop down pretty far... Not 3,500 RPM.

Something was stuck on my machine or not working properly. It scared me at first coming off the highway. It has never done that before. 12,000 miles... I know when something's broken. SRM... No.

m4a1mustang 01-29-2010 09:12 AM

Quote:

Originally Posted by TheWeatherman (Post 379545)
I really believe it had nothing to do with the SRM. When the car was stopped, idling, it still idled at around 3,500 RPM. SRM only is effective when the car is in motion. It uses speed and gear position to find it's rev point. If I'm stopped and outside of the car, it shouldn't be revving at 3,500 RPM.

As far as the temperature, when it's this cold, the oil temperatures reflect that. It was in it's normal operating temperature for this ambient temperature. If you drive your car when it's 0-10 degrees down the highway, you'll notice your oil temp will be between 170°-190°F. That's where mine was. Car was out and about for at least 25 minutes when the video was taken. I don't have an oil cooler.

I don't always drop to neutral. When I was coming off of the highway to a stoplight, the car was actually speeding up. I was hitting the brakes in 6th trying to come down from 60MPH when I noticed something was wrong. Hence, nothing to do with SRM. Try it in your car. Go cruising around the city, pop it in neutral, put the stick right in the middle of the gate, don't touch the shifter, and the revs should drop down pretty far... Not 3,500 RPM.

Something was stuck on my machine or not working properly. It scared me at first coming off the highway. It has never done that before. 12,000 miles... I know when something's broken. SRM... No.

I think we can rule that out.

I would definitely reset the ECU and see what happens. It could just be some random glitch, but it seems like it may be something more serious.

See how the reset goes and like I said earlier, take it in for service immediately if it doesn't. And obviously, be careful!

TheWeatherman 01-29-2010 09:12 AM

M4 Mustang is right. SRM doesn't act like that. It sounds like you drive like me. When the revs get too low, and I'm coming to a stop, I drop it to neutral in the middle of the shift gate. Like Mustang said, if I start hinting that I'm heading toward a gear, it will aggresively blip at me. This was just a constant rev that wouldn't go down. Thanks for backing that up M4.

I should reset the car, or maybe it has a code stored and I should take it in. Hmmmm.

semtex 01-29-2010 09:14 AM

Quote:

Originally Posted by TheWeatherman (Post 379545)
I really believe it had nothing to do with the SRM. When the car was stopped, idling, it still idled at around 3,500 RPM. SRM only is effective when the car is in motion. It uses speed and gear position to find it's rev point. If I'm stopped and outside of the car, it shouldn't be revving at 3,500 RPM.

As far as the temperature, when it's this cold, the oil temperatures reflect that. It was in it's normal operating temperature for this ambient temperature. If you drive your car when it's 0-10 degrees down the highway, you'll notice your oil temp will be between 170°-190°F. That's where mine was. Car was out and about for at least 25 minutes when the video was taken. I don't have an oil cooler.

I don't always drop to neutral. When I was coming off of the highway to a stoplight, the car was actually speeding up. I was hitting the brakes in 6th trying to come down from 60MPH when I noticed something was wrong. Hence, nothing to do with SRM. Try it in your car. Go cruising around the city, pop it in neutral, put the stick right in the middle of the gate, don't touch the shifter, and the revs should drop down pretty far... Not 3,500 RPM.

Something was stuck on my machine or not working properly. It scared me at first coming off the highway. It has never done that before. 12,000 miles... I know when something's broken. SRM... No.

Why don't you just try turning it off to be sure? I mean, would it really hurt anything just to give it a shot in the spirit of process of elimination? Also, if your car was speeding up when you were coming off the highway, that would actually cause SRM to hold the revs higher, as the faster you're going when you drop to a lower gear, the higher the revs need to be for a smooth match.

TheWeatherman 01-29-2010 09:16 AM

Quote:

Originally Posted by semtex (Post 379561)
Why don't you just try turning it off to be sure? I mean, would it really hurt anything just to give it a shot in the spirit of process of elimination? Also, if your car was speeding up when you were coming off the highway, that would actually cause SRM to hold the revs higher, as the faster you're doing when you drop to a lower gear, the higher the revs need to be for a smooth match.

But I didn't downshift (In 6th) and was completely off the throttle. That system knows that and won't intervene in that situation. I'm positive it wasn't SRM.

semtex 01-29-2010 09:17 AM

Btw, just to be clear, based on this happening when you're not even in motion and outside the car, I would agree that it's not SRM. I just think it can't hurt to see if turning SRM yields any change in behavior is all. Every little clue helps, after all.

semtex 01-29-2010 09:22 AM

Quote:

Originally Posted by TheWeatherman (Post 379564)
But I didn't downshift (In 6th) and was completely off the throttle. That system knows that and won't intervene in that situation. I'm positive it wasn't SRM.

Yep, I see what you're saying. But I guess what I'm trying to say is this. It definitely wasn't SRM in the context of what SRM is supposed to do. But what if it's a malfunctioning SRM? What if you have a malfunctioning SRM that thinks you downshifted even when you didn't, for instance? You could disconnect the battery, and that might (indeed hopefully) fix it. But unless you try turning the SRM off first to see if it changes anything, then for all we know, the battery disconnect fixed the problem by rebooting a faulty SRM. Of course, at that point if it fixes your problem it doesn't really matter right? I guess I'm just being anal about trying to hone in on the root cause. ;)

gemini09m3 01-29-2010 09:27 AM

Instead of worrying about how this situation scares you just take it to the dealer its under warranty!!!!

TheWeatherman 01-29-2010 09:31 AM

Quote:

Originally Posted by gemini09m3 (Post 379580)
Instead of worrying about how this situation scares you just take it to the dealer its under warranty!!!!

I'm not scared. I just thought I'd share it with you guys! Something to watch for.

WICKED_GRIN 01-29-2010 09:35 AM

Quote:

Originally Posted by gemini09m3 (Post 379580)
Instead of worrying about how this situation scares you just take it to the dealer its under warranty!!!!




+1

bullitt5897 01-29-2010 09:55 AM

TW, I have played around with SRM quite a bit and yes it will hold 3500rpms in neutral if it is near one of the gates. I as a fun lil habit when coasting in neutral will push the shifter laterally to the lower gears and it will act like it rev'd but I never came even close to a gate... in my case it would hold it for several seconds and then finally relent. I believe with turning the SRM system off while running the car for a few mile then turning it back on will help trouble shoot the issue. For sure I know it is an SRM issue like I stated before. I didnt see that you were at zero mph earlier and after watching the video again I see that. turn off the SRM drive it and see if that fixes the issue, then turn it back on and see if it continues. if that doesnt work unplug the battery for several minutes to let everything die down and then plug the battery back up and try again.

This is problem shooting 101... Now you say you arent worried but man seriously you should hear your voice in that video. Im not meaning to sound like a prick or an A$$hole but you sound so worried and like a little b!tch. I dont mean to be rude but take a step out and realize its a machine it may have problems and its not doing it to you on purpose. Its not bad luck either and if the problem persists take it to the dealer this is not that big of a deal! and this coming from 1 of 2 on these forums that has blown a stock motor already! I blew my motor at 10,100 miles and 1/2 mile from the dealership cause the motor was making funny noises. My car has been in more shops for over 6 months than it has been on the road. Just relax and take another video without the "why is this happening to me" attitude... Thanks and we all want to see you enjoying your Z so try these trouble shooting ideas before you shoot them down.

Mike

HKYStormFront 01-29-2010 10:11 AM

chalk me up in the group that says take it to the dealer and let them figure it out. probably just a hard reset on the ECU to relearn the parameters. just post what they find and then we'll all know...


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