Very odd problem

Lowbz21 · 01-18-2014, 06:39 PM

When I am in mid corner going decently quick, off the gas, once I hit a certain amount of lateral g-force the car goes slightly on the gas by itself.

Can someone chime in on what they think this might be or why it's doing it?

Rusty · 01-18-2014, 10:18 PM

Left or right hand turn?

Lowbz21 · 01-18-2014, 10:25 PM

Quote:

Originally Posted by Rusty

Left or right hand turn?

Both

DEpointfive0 · 01-18-2014, 10:28 PM

Quote:

Originally Posted by Lowbz21

Both

Lies!!! Lol

It's honestly most likely a long hard right turn. Which is fuel starve because the gas tank is designed shittily

Lowbz21 · 01-18-2014, 10:31 PM

Quote:

Originally Posted by DEpointfive0

Lies!!! Lol

It's honestly most likely a long hard right turn. Which is fuel starve because the gas tank is designed shittily

Lol nope it's both but wouldn't fuel starvation be the opposite? More of a bog rather than giving the car gas?

SPOHN · 01-18-2014, 10:34 PM

Your car is trying to say let's go

DEpointfive0 · 01-18-2014, 10:35 PM

Quote:

Originally Posted by Lowbz21

Lol nope it's both but wouldn't fuel starvation be the opposite? More of a bog rather than giving the car gas?

Yep. I'm drunk and have been for 2 days. I read that the car goes off the gas itself. My bad.
Carry on

Lowbz21 · 01-18-2014, 10:36 PM

Quote:

Originally Posted by DEpointfive0

Yep. I'm drunk and have been for 2 days. I read that the car goes off the gas itself. My bad.
Carry on

Hahah I actually laughed at that

SurfDog · 01-18-2014, 11:11 PM

Mine does it too. I think its a VDC thing to keep you from skid/over-steering. It usually happens on full decel, in medium to hard high speed (50-60 mph) turns. about .8 Gs maybe. Usually downhill it seems.

Try to find a place where it happens consistantly, under known parameters (mostly speed). (I found a certain off ramp that did it) ... then try the turn with VDC off.

SouthArk370Z · 01-19-2014, 07:03 AM

Just a guess but, if you have the 7AT, it may be the throttle blip on downshift.

Lowbz21 · 01-19-2014, 08:11 AM

Quote:

Originally Posted by SurfDog

Mine does it too. I think its a VDC thing to keep you from skid/over-steering. It usually happens on full decel, in medium to hard high speed (50-60 mph) turns. about .8 Gs maybe. Usually downhill it seems.

Try to find a place where it happens consistantly, under known parameters (mostly speed). (I found a certain off ramp that did it) ... then try the turn with VDC off.

Ill try with vdc off, but if that's what it is that seems very unsafe.

Quote:

Originally Posted by SouthArk370Z

Just a guess but, if you have the 7AT, it may be the throttle blip on downshift.

It's a manual

SurfDog · 01-19-2014, 01:17 PM

Well when you say unsafe i kind of agree. It always used to catch me by surprise. Once you begin to anticipate it... It's just annoying. I go VDC off for decelerating downhill turns.

VDC is really only useful when you are turning your attention level down or are in wet/snow IMHO.

Lowbz21 · 01-19-2014, 09:00 PM

Quote:

Originally Posted by SurfDog

Well when you say unsafe i kind of agree. It always used to catch me by surprise. Once you begin to anticipate it... It's just annoying. I go VDC off for decelerating downhill turns.

VDC is really only useful when you are turning your attention level down or are in wet/snow IMHO.

You may be right, I turned vdc off and went around a corner trying to get the car to do it and it didn't happen. I may just not have been going quick enough but if it is the vdc I won't why I couldn't find anything when I searched. You'd think these track guys would go nuts the first time it happened and post something up trying to figure it out.

SurfDog · 01-20-2014, 05:37 PM

It doesn't happen when you are braking as far as I can tell. Track guys (like me) seldom only engine brake around turns. Usually there is either some feathered in throttle or full brake or full throttle on race turns. Also most of my tracking is done VDC off so I can slide a bit without loosing power exiting turns. VDC off eliminates the problem.

I'm with you though the first time it happened to me, I almost crapped my pants it was so unexpected.

SurfDog · 01-20-2014, 05:42 PM

Try going around the same turn several times at known speeds to induce the "nanny". Then once you can get it reliably to occur go VDC off. I bet your problem will be solved.

I believe this is caused by the unloaded rear wheel slipping as you turn. The throttle comes in to "plant the wheel and/or to negate your deceleration (moves your "traction circle" more toward the lateral axis as you turn.)

One note, that's a pretty aggressive (close to lateral g limit) turn to get the VDC to step in. Be careful out there. Cheers!

01-18-2014, 06:39 PM	#1 (permalink)
Lowbz21 Track Member Join Date: Mar 2013 Location: North Jersey Posts: 542 Drives: 370z & LSX 260z Rep Power: 13	Very odd problem When I am in mid corner going decently quick, off the gas, once I hit a certain amount of lateral g-force the car goes slightly on the gas by itself. Can someone chime in on what they think this might be or why it's doing it? __________________ @jayem_bo Last edited by Lowbz21; 01-18-2014 at 06:44 PM.

01-18-2014, 10:18 PM	#2 (permalink)
Rusty Ronin Samurai - Assassin Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 68 Posts: 34,890 Drives: 2011 Nismo GM 6M Rep Power: 2684436	Left or right hand turn? __________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html

01-18-2014, 10:34 PM	#6 (permalink)
SPOHN A True Z Fanatic Join Date: Feb 2010 Location: Covington, GA Age: 45 Posts: 14,844 Drives: Waiting on next Z Rep Power: 221	Your car is trying to say let's go TerribleONE, DEpointfive0 and jlo370z like this. __________________

01-18-2014, 11:11 PM	#9 (permalink)
SurfDog A True Z Fanatic Join Date: May 2012 Location: Colorado (9000 feet) Age: 56 Posts: 1,793 Drives: 09 6mt, 13 Sequoia, Rep Power: 15748	Mine does it too. I think its a VDC thing to keep you from skid/over-steering. It usually happens on full decel, in medium to hard high speed (50-60 mph) turns. about .8 Gs maybe. Usually downhill it seems. Try to find a place where it happens consistantly, under known parameters (mostly speed). (I found a certain off ramp that did it) ... then try the turn with VDC off. __________________ 09 6spd Berk CBE, JWT cams, ZSpeed CSC, Stillen (25 row oil, brake cooling, sways, gen3 CAI), Passport (9500ci), Quaife LSD, Z1 400 hp kit, ss lines, pads, rotors, clutch etc, Phunk's pan and fuel starve fix Last edited by SurfDog; 01-18-2014 at 11:15 PM.

01-19-2014, 07:03 AM	#10 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324197	Just a guess but, if you have the 7AT, it may be the throttle blip on downshift. GSS138 and megalapagas like this. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

01-19-2014, 01:17 PM	#12 (permalink)
SurfDog A True Z Fanatic Join Date: May 2012 Location: Colorado (9000 feet) Age: 56 Posts: 1,793 Drives: 09 6mt, 13 Sequoia, Rep Power: 15748	Well when you say unsafe i kind of agree. It always used to catch me by surprise. Once you begin to anticipate it... It's just annoying. I go VDC off for decelerating downhill turns. VDC is really only useful when you are turning your attention level down or are in wet/snow IMHO. __________________ 09 6spd Berk CBE, JWT cams, ZSpeed CSC, Stillen (25 row oil, brake cooling, sways, gen3 CAI), Passport (9500ci), Quaife LSD, Z1 400 hp kit, ss lines, pads, rotors, clutch etc, Phunk's pan and fuel starve fix

01-20-2014, 05:37 PM	#14 (permalink)
SurfDog A True Z Fanatic Join Date: May 2012 Location: Colorado (9000 feet) Age: 56 Posts: 1,793 Drives: 09 6mt, 13 Sequoia, Rep Power: 15748	Very odd problem It doesn't happen when you are braking as far as I can tell. Track guys (like me) seldom only engine brake around turns. Usually there is either some feathered in throttle or full brake or full throttle on race turns. Also most of my tracking is done VDC off so I can slide a bit without loosing power exiting turns. VDC off eliminates the problem. I'm with you though the first time it happened to me, I almost crapped my pants it was so unexpected. __________________ 09 6spd Berk CBE, JWT cams, ZSpeed CSC, Stillen (25 row oil, brake cooling, sways, gen3 CAI), Passport (9500ci), Quaife LSD, Z1 400 hp kit, ss lines, pads, rotors, clutch etc, Phunk's pan and fuel starve fix Last edited by SurfDog; 01-20-2014 at 05:39 PM.

01-20-2014, 05:42 PM	#15 (permalink)
SurfDog A True Z Fanatic Join Date: May 2012 Location: Colorado (9000 feet) Age: 56 Posts: 1,793 Drives: 09 6mt, 13 Sequoia, Rep Power: 15748	Very odd problem Try going around the same turn several times at known speeds to induce the "nanny". Then once you can get it reliably to occur go VDC off. I bet your problem will be solved. I believe this is caused by the unloaded rear wheel slipping as you turn. The throttle comes in to "plant the wheel and/or to negate your deceleration (moves your "traction circle" more toward the lateral axis as you turn.) One note, that's a pretty aggressive (close to lateral g limit) turn to get the VDC to step in. Be careful out there. Cheers! __________________ 09 6spd Berk CBE, JWT cams, ZSpeed CSC, Stillen (25 row oil, brake cooling, sways, gen3 CAI), Passport (9500ci), Quaife LSD, Z1 400 hp kit, ss lines, pads, rotors, clutch etc, Phunk's pan and fuel starve fix Last edited by SurfDog; 01-20-2014 at 05:46 PM.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
A/C Problem	djohnson1967	Nissan 370Z General Discussions	12	03-30-2015 07:14 AM
problem	Axelsc1	Nissan 370Z Warranty / Scheduled Maintenance / Servicing / Repairs	0	02-06-2012 08:37 AM
Help with problem	reunited	Audio & Video	9	01-28-2012 04:14 PM
Mod problem	504 370z	Intake/Exhaust	25	01-12-2011 08:31 PM
New Roadster, Spoiler problem, dealer problem	Hello	Nissan 370Z General Discussions	26	01-11-2010 05:22 PM