She's acting up....

speedworks · 03-04-2010, 08:10 PM

Quote:

Originally Posted by Pharmacist

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.

Pharmacist · 03-04-2010, 09:59 PM

Quote:

Originally Posted by speedworks

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?

speedworks · 03-05-2010, 07:17 PM

Quote:

Originally Posted by Pharmacist

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

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

ChrisSlicks · 04-23-2010, 09:09 PM

Quote:

Originally Posted by speedworks

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.

Any update there speed? My car just started exhibiting this behavior tonight while taking a ramp at speed. Wasn't close to the edge of traction but I was going quicker than average, around 5K in 3rd gear. While holding constant speed I felt the engine surge a couple of times pushing the car a little. Happened earlier in the day as well but at much lower speed, around 2K in 2nd or 3rd. Really don't like the feeling and I haven't experienced it up to this point. Only thing I changed recently was the Berk CBE.

speedworks · 04-27-2010, 10:05 AM

Nothing yet. I was away on vacation for the last week, and before that I called the dealership again, and still no solution (that they have been told). Honestly, until enough people bring these in, and complain about it, it won't be a priority.

"the squeaky wheel gets the grease"

I was actually hoping you didn't feel this issue, so we could meet up and see if I could make it happen - oh well. I'm so disappointed with this issue, that it makes me want to sell it, I can duplicate it on almost every on/off ramp (assuming no-one is in front of me).

ChrisSlicks · 04-27-2010, 10:40 AM

Quote:

Originally Posted by speedworks

Nothing yet. I was away on vacation for the last week, and before that I called the dealership again, and still no solution (that they have been told). Honestly, until enough people bring these in, and complain about it, it won't be a priority.

"the squeaky wheel gets the grease"

I was actually hoping you didn't fee this issue, so we could meet up and see if I could make it happen - oh well. I'm so disappointed with this issue, that it makes me want to sell it, I can duplicate it on almost every on/off ramp (assuming no-one is in front of me).

I've only had it twice and haven't been able to reproduce it at will. I am going to report it to the dealer anyway even though they won't be able to do anything.

speedworks · 04-27-2010, 01:33 PM

Hey, heading to NHMS this weekend for my first race, if you are interested.

ChrisSlicks · 04-27-2010, 01:52 PM

Quote:

Originally Posted by speedworks

Hey, heading to NHMS this weekend for my first race, if you are interested.

Is that the SCCA event? Sounds like fun, unfortunately I already have an auto-x event that day.

speedworks · 04-27-2010, 04:38 PM

Yep, first SCCA race of the year - where's the solo?

04-27-2010, 10:05 AM	#5 (permalink)
speedworks Track Member Join Date: Jan 2009 Location: Boston, MA Posts: 550 Drives: PW purchased 01/09 Rep Power: 19	Nothing yet. I was away on vacation for the last week, and before that I called the dealership again, and still no solution (that they have been told). Honestly, until enough people bring these in, and complain about it, it won't be a priority. "the squeaky wheel gets the grease" I was actually hoping you didn't feel this issue, so we could meet up and see if I could make it happen - oh well. I'm so disappointed with this issue, that it makes me want to sell it, I can duplicate it on almost every on/off ramp (assuming no-one is in front of me). Last edited by speedworks; 04-27-2010 at 01:31 PM.

04-27-2010, 01:33 PM	#7 (permalink)
speedworks Track Member Join Date: Jan 2009 Location: Boston, MA Posts: 550 Drives: PW purchased 01/09 Rep Power: 19	Hey, heading to NHMS this weekend for my first race, if you are interested.

04-27-2010, 04:38 PM	#9 (permalink)
speedworks Track Member Join Date: Jan 2009 Location: Boston, MA Posts: 550 Drives: PW purchased 01/09 Rep Power: 19	Yep, first SCCA race of the year - where's the solo?