One for the experts
Thread Starter
Pro
Joined: Jul 2014
Posts: 560
Likes: 374
From: Niagara-on-the-Lake, ON
One for the experts
My car is a '16 Z51 with M7 and mag ride. I have noticed that whenever I accelerate hard in first gear from a standing start (or even slightly rolling start), the engine "waffles" like the revs are bouncing up and down. It goes away once I shift into second. Any ideas what this is?
Someone told me it will happen if the traction control is engaged. But that doesn't make sense to me. I usually drive in "Sport" mode.
Someone told me it will happen if the traction control is engaged. But that doesn't make sense to me. I usually drive in "Sport" mode.
Safety Car
Joined: Mar 2009
Posts: 4,101
Likes: 719
From: Northeast MA & Mad Beach FL
I'm no expert but if you're accelerating hard enough, especially in 1st, your tires could be spinning even though you might not notice it.
And, with traction control on, it will intermittently cut power to the engine trying to keep the tires from spinning.
Once you hit 2nd gear, the tires are probably not spinning as much.
Others with more technical info might chime in
And, with traction control on, it will intermittently cut power to the engine trying to keep the tires from spinning.
Once you hit 2nd gear, the tires are probably not spinning as much.
Others with more technical info might chime in
Last edited by Steve Garrett; Sep 12, 2016 at 09:10 PM. Reason: No need to re-quote the OP, especially if you're the next person posting.
Thread Starter
Pro
Joined: Jul 2014
Posts: 560
Likes: 374
From: Niagara-on-the-Lake, ON
I'm no expert but if you're accelerating hard enough, especially in 1st, your tires could be spinning even though you might not notice it.
And, with traction control on, it will intermittently cut power to the engine trying to keep the tires from spinning.
Once you hit 2nd gear, the tires are probably not spinning as much.
Others with more technical info might chime in
And, with traction control on, it will intermittently cut power to the engine trying to keep the tires from spinning.
Once you hit 2nd gear, the tires are probably not spinning as much.
Others with more technical info might chime in
Drifting
Joined: Aug 2015
Posts: 1,434
Likes: 183
From: Maple Ontario
I know what you mean! fully engaged the clutch and then into the throttle ( just because i don't want to wear it excessively) Sometimes it feels like the clutch is slipping or in the old carburated days, the carb wasn't dumping the fuel in...
will have to try TRACK mode to see.
will have to try TRACK mode to see.
Team Owner
Joined: Nov 2007
Posts: 45,274
Likes: 8,545
From: Rochester, NY
Exactly what is happening.I'm no expert but if you're accelerating hard enough, especially in 1st, your tires could be spinning even though you might not notice it.
And, with traction control on, it will intermittently cut power to the engine trying to keep the tires from spinning.
Once you hit 2nd gear, the tires are probably not spinning as much.
Others with more technical info might chime in
And, with traction control on, it will intermittently cut power to the engine trying to keep the tires from spinning.
Once you hit 2nd gear, the tires are probably not spinning as much.
Others with more technical info might chime in
Burning Brakes
Joined: Oct 2011
Posts: 993
Likes: 481
From: Roseville MI
Scott
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Premium Supporting Vendor
Joined: Jun 2008
Posts: 2,033
Likes: 514
From: Pahrump NV
More than likely, as stated, it's your traction control.
If you put your car in different modes, the traction control is on, unless you push the center button on the mode selector. If tire spin is your want, then push and hold the tc button down until the two orange lights come on. That will turn all the Aids off. Be careful though! In weather mode, it will limit what you can turn off.
putting the car in track mode, then pushing the center button twice quickly will bring up the ptm (performance traction management) sub menu, which then allows you to cycle through the various modes. Each turn on it to the right will give you less and less traction/active handling/ptm intrusion.
If your car has pdr, then record yourself doing what you're experiencing, post it or send to me! And we can take a closer look at it.
Hope this helps!
If you put your car in different modes, the traction control is on, unless you push the center button on the mode selector. If tire spin is your want, then push and hold the tc button down until the two orange lights come on. That will turn all the Aids off. Be careful though! In weather mode, it will limit what you can turn off.
putting the car in track mode, then pushing the center button twice quickly will bring up the ptm (performance traction management) sub menu, which then allows you to cycle through the various modes. Each turn on it to the right will give you less and less traction/active handling/ptm intrusion.
If your car has pdr, then record yourself doing what you're experiencing, post it or send to me! And we can take a closer look at it.
Hope this helps!
Thread Starter
Pro
Joined: Jul 2014
Posts: 560
Likes: 374
From: Niagara-on-the-Lake, ON
More than likely, as stated, it's your traction control.
If you put your car in different modes, the traction control is on, unless you push the center button on the mode selector. If tire spin is your want, then push and hold the tc button down until the two orange lights come on. That will turn all the Aids off. Be careful though! In weather mode, it will limit what you can turn off.
putting the car in track mode, then pushing the center button twice quickly will bring up the ptm (performance traction management) sub menu, which then allows you to cycle through the various modes. Each turn on it to the right will give you less and less traction/active handling/ptm intrusion.
If your car has pdr, then record yourself doing what you're experiencing, post it or send to me! And we can take a closer look at it.
Hope this helps!
If you put your car in different modes, the traction control is on, unless you push the center button on the mode selector. If tire spin is your want, then push and hold the tc button down until the two orange lights come on. That will turn all the Aids off. Be careful though! In weather mode, it will limit what you can turn off.
putting the car in track mode, then pushing the center button twice quickly will bring up the ptm (performance traction management) sub menu, which then allows you to cycle through the various modes. Each turn on it to the right will give you less and less traction/active handling/ptm intrusion.
If your car has pdr, then record yourself doing what you're experiencing, post it or send to me! And we can take a closer look at it.
Hope this helps!
Thread Starter
Pro
Joined: Jul 2014
Posts: 560
Likes: 374
From: Niagara-on-the-Lake, ON
Drifting
Joined: Aug 2015
Posts: 1,434
Likes: 183
From: Maple Ontario
Okay, tried Track mode versus Tour mode and the throttle off the line is better... in Tour it is not near as responsive... easily spun the wheels but i knew it.... so i believe it to be related to drive modes and throttle sensitivity... personally i would like more customization in the Drive Mode Settings, so i can pick an choose all parameters, not just exhaust and steering... but throttle as well.... would make my car feel much faster.
Former Vendor
Joined: Dec 2015
Posts: 119
Likes: 10
From: Hoover AL
traction control tells the engine control that the T/C needs help with spin and the ECM will retard the timing until the spin or near spin is over then the timing will return to normal. It all happens in nano seconds, but a very smart system.
Le Mans Master
Joined: Dec 2008
Posts: 6,612
Likes: 493
From: brooklyn ny
I'm no expert but if you're accelerating hard enough, especially in 1st, your tires could be spinning even though you might not notice it.
And, with traction control on, it will intermittently cut power to the engine trying to keep the tires from spinning.
Once you hit 2nd gear, the tires are probably not spinning as much.
Others with more technical info might chime in
And, with traction control on, it will intermittently cut power to the engine trying to keep the tires from spinning.
Once you hit 2nd gear, the tires are probably not spinning as much.
Others with more technical info might chime in
Burning Brakes
Joined: Jan 2015
Posts: 780
Likes: 94
From: Pittsburgh PA
Okay, tried Track mode versus Tour mode and the throttle off the line is better... in Tour it is not near as responsive... easily spun the wheels but i knew it.... so i believe it to be related to drive modes and throttle sensitivity... personally i would like more customization in the Drive Mode Settings, so i can pick an choose all parameters, not just exhaust and steering... but throttle as well.... would make my car feel much faster.
