She's acting up....

dszombiex · 08-06-2009, 02:53 PM

Well, not quite the same but related to the synchro rev...

I have the 7AT. I was under the impression that the synchro rev is only on when the tranny is in sport mode for the auto and I manually downshift. Until a few days ago this has always been the case for me.

Well this past weekend when I was coasting downhill in full auto mode with my foot completely off the throttle, the car suddenly revved twice! It was a decent rev too like up to 4k or something. I drive in full auto mode when I'm lazy or during my daily commute to work all the time. Its never gone off in full auto mode before.

speedworks · 08-06-2009, 04:08 PM

I've had this happen many times with spirited on/off ramp driving. The car does feel like it accelerates, but I think it is only not braking (by the engine). I am not sure what or why the car does this - but it has done it since I have had it (Jan). It is only noticeable when I am at/near the limits in a turn (at no throttle).

fullmonty · 02-20-2010, 03:31 PM

Quote:

Originally Posted by dszombiex

Well this past weekend when I was coasting downhill in full auto mode with my foot completely off the throttle, the car suddenly revved twice! It was a decent rev too like up to 4k or something. I drive in full auto mode when I'm lazy or during my daily commute to work all the time. Its never gone off in full auto mode before.

Same with my 7AT, was going down a fairly step hill, foot off the gas just kind of coasting down at aprox. 40-45mph, the car downshifted but held the RPM at 4k. Didn't feel an increase in speed or anything, just held at 4k until I breaked. Took me by suprise but I don't think it's anything to worry about.

speedworks · 02-22-2010, 02:09 PM

UPDATE: Just took it to the dealer, and was able to re-enact the issue with a tech in the car. One thing I didn't think about was putting my foot in the clutch when it happens. He suggested it, and what do you know, the car went to 4500 rpm and maintained that rpm through the turn (or until I touched the brake or the turn straightened out). So, it was definately maintaining a throttle. Those with this issue should try the same thing. Anyway, the car is in their hands now; and hopefully they call with a option/solution.

Premo34WV · 02-22-2010, 02:39 PM

glad to hear this was reenacted with the dealer present. Please update us as this is still happening to me. And i agree it only happens at the "sweet spot" of the gear.

speedworks · 02-23-2010, 06:38 PM

Quick update:
They couldn't find any obvious issue to cause the problem (checked all wiring and sensors, and found nothing). They have a call into Engineering, and are awaiting an answer of what to do next - they will have the car for a few more days. Its supposed to rain around here the rest of the week, so no biggie for me.

I also put in a complaint on the PW sideskirts not being a perfect paint fit (like all of them). Again, they will be reviewed by a corp representative when they are back in town (the run around on that one).

speedworks · 02-25-2010, 05:56 PM

Well, they called today, and said I can pick it up. The dealer said that Engineering (Nissan) came back saying they are working on it, and will let me (the dealer) know when they have a fix - timing unknown.

Hmmm, disappointing.

BoostAddict · 02-25-2010, 06:17 PM

Quote:

Originally Posted by speedworks

Well, they called today, and said I can pick it up. The dealer said that Engineering (Nissan) came back saying they are working on it, and will let me (the dealer) know when they have a fix - timing unknown.

Hmmm, disappointing.

They, Nissan Engineering, probably have to modify their algorithm used for SRM. Maybe/Hopefully enough people will complain about this issue to have it escalated so a fix (in the form of a TSB) can be pushed out sooner rather than later.

I wouldn't hold my breath in hopes of a fix to be released soon though. When they do develop a fix, it will have to go through extensive (read long) testing.

08-06-2009, 02:53 PM	#1 (permalink)
dszombiex Base Member Join Date: May 2009 Location: Los Angeles Posts: 230 Drives: 09 370z MB 7AT Rep Power: 374	Well, not quite the same but related to the synchro rev... I have the 7AT. I was under the impression that the synchro rev is only on when the tranny is in sport mode for the auto and I manually downshift. Until a few days ago this has always been the case for me. Well this past weekend when I was coasting downhill in full auto mode with my foot completely off the throttle, the car suddenly revved twice! It was a decent rev too like up to 4k or something. I drive in full auto mode when I'm lazy or during my daily commute to work all the time. Its never gone off in full auto mode before.

08-06-2009, 04:08 PM	#2 (permalink)
speedworks Track Member Join Date: Jan 2009 Location: Boston, MA Posts: 550 Drives: PW purchased 01/09 Rep Power: 18	I've had this happen many times with spirited on/off ramp driving. The car does feel like it accelerates, but I think it is only not braking (by the engine). I am not sure what or why the car does this - but it has done it since I have had it (Jan). It is only noticeable when I am at/near the limits in a turn (at no throttle).

02-22-2010, 02:09 PM	#4 (permalink)
speedworks Track Member Join Date: Jan 2009 Location: Boston, MA Posts: 550 Drives: PW purchased 01/09 Rep Power: 18	UPDATE: Just took it to the dealer, and was able to re-enact the issue with a tech in the car. One thing I didn't think about was putting my foot in the clutch when it happens. He suggested it, and what do you know, the car went to 4500 rpm and maintained that rpm through the turn (or until I touched the brake or the turn straightened out). So, it was definately maintaining a throttle. Those with this issue should try the same thing. Anyway, the car is in their hands now; and hopefully they call with a option/solution.

02-22-2010, 02:39 PM	#5 (permalink)
Premo34WV Base Member Join Date: Jun 2009 Location: Morgantown, W.Virginia Posts: 68 Drives: PW '09 370z Sp. 6mt Rep Power: 16	glad to hear this was reenacted with the dealer present. Please update us as this is still happening to me. And i agree it only happens at the "sweet spot" of the gear.

02-23-2010, 06:38 PM	#6 (permalink)
speedworks Track Member Join Date: Jan 2009 Location: Boston, MA Posts: 550 Drives: PW purchased 01/09 Rep Power: 18	Quick update: They couldn't find any obvious issue to cause the problem (checked all wiring and sensors, and found nothing). They have a call into Engineering, and are awaiting an answer of what to do next - they will have the car for a few more days. Its supposed to rain around here the rest of the week, so no biggie for me. I also put in a complaint on the PW sideskirts not being a perfect paint fit (like all of them). Again, they will be reviewed by a corp representative when they are back in town (the run around on that one).

02-25-2010, 05:56 PM	#7 (permalink)
speedworks Track Member Join Date: Jan 2009 Location: Boston, MA Posts: 550 Drives: PW purchased 01/09 Rep Power: 18	Well, they called today, and said I can pick it up. The dealer said that Engineering (Nissan) came back saying they are working on it, and will let me (the dealer) know when they have a fix - timing unknown. Hmmm, disappointing.