L99 cars please try this test - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

BrianT · 04-12-2013, 07:00 AM

Hello,

If you have an L99 please try this test and let me know what happens.
With the car in Drive and traction control on, find a spot where you're driving along at 45-50mph and then can make a left turn.
Pull into the left turn lane a little on the throttle, not crazy but a little aggressive, coast to almost a stop, then push the gas pedal to make the turn a little aggressive, like there is traffic coming at you, and please let me know if you experience any kind of lag when you push the throttle to make the turn.
My wife's 2011 L99 has this lag, with and without a tune, but I have experienced it in every drive by wire car I've ever driven, so I don't think there's much that can be done about it.

Thanks
Brian

the_fast_one · 04-12-2013, 07:05 AM

The lag is probably due to the stability control. Your probably breaking the tires loose a little.

Ruffrider51 · 04-12-2013, 07:14 AM

Stability control or AFM maybe ?

Hannibal · 04-12-2013, 07:19 AM

AFM is usually the issue. There is a noted lag when the car has to switch from 4 cyl to 8 cyl.

The Stig · 04-12-2013, 07:20 AM

Didn't say Simon Says.

Seriously though - hope you get it figured out.

BrianT · 04-12-2013, 07:33 AM

It's not AFM, it happens with and without the tune. The tune turned off AFM.
It's definitely not breaking the tires loose, it would need to repsond to do that.
When this happens, just like on other drive by wire cars, there is no response to the throttle for at least a whole second. Then it goes like mad.

E.T. · 04-12-2013, 07:38 AM

Maybe weak MAF sensor?

Hannibal · 04-12-2013, 07:42 AM

Then the only other thing that I can think of is the torque management feature (on by default in the factory tune). When you hit the gas, electronics decide how much power gets to the wheels. It's not like the good old days when all of your HP/torque were at the other end of the throttle cable.

Give torque management a search and see if that fits the issue you're having.

CamaroTom · 04-12-2013, 07:42 AM

Is it slow to down shift? Did the tune change anything in the transmission?

nyrfan · 04-12-2013, 07:49 AM

Get a ported TB, that will "help" with the lag.

BrianT · 04-12-2013, 07:53 AM

I'll check the MAF, after researching that, it could be part of it.
The car has the CAI cold air, Dynatech full length headers cat back exhaust, with the Janetty tune.
When I asked Janetty what was done in the tune he did for me, he mentioned Torque Management, but he didn't say what he did to it.

BrianT · 04-12-2013, 07:55 AM

It doesn't seem to be slow to downshift.

Hannibal · 04-12-2013, 08:05 AM

I would call Jenetty and explain the symptoms. They may have an answer for you.

Also, if you have a wet filter on your CIA and that oil gets all over the MAF, you'll have problems similar to this. It's worth a look too.

vroomapunk · 04-12-2013, 08:15 AM

If you are aggressively turning, and hitting the throttle, you are gonna break the tires loose, so if you have stabilitrak or traction control on at any level (i.e. not completely off), then it will feel like its bogging down the engine, so you keep traction

04-12-2013, 07:00 AM	#1
BrianT Drives: 2011 Camaro SS L99 Join Date: Jun 2012 Location: Murphy, Tx Posts: 23	L99 cars please try this test Hello, If you have an L99 please try this test and let me know what happens. With the car in Drive and traction control on, find a spot where you're driving along at 45-50mph and then can make a left turn. Pull into the left turn lane a little on the throttle, not crazy but a little aggressive, coast to almost a stop, then push the gas pedal to make the turn a little aggressive, like there is traffic coming at you, and please let me know if you experience any kind of lag when you push the throttle to make the turn. My wife's 2011 L99 has this lag, with and without a tune, but I have experienced it in every drive by wire car I've ever driven, so I don't think there's much that can be done about it. Thanks Brian

04-12-2013, 07:20 AM	#5
The Stig knows 2 facts about ducks Drives: ...and they're both wrong Join Date: Aug 2009 Location: The HMS Invincible Posts: 25,072 View My Garage	Didn't say Simon Says. Seriously though - hope you get it figured out. __________________

04-12-2013, 07:38 AM	#7
E.T. Drives: 2012 Camaro 2SS/RS Join Date: Jul 2010 Location: Cleveland, OH Posts: 3,267	Maybe weak MAF sensor? __________________

04-12-2013, 07:42 AM	#9
CamaroTom Drives: 1/70 2013 BRM 2SS RS 1LE NPP NAV Join Date: Feb 2013 Location: Parrish, Florida Posts: 1,082	Is it slow to down shift? Did the tune change anything in the transmission? __________________

04-12-2013, 07:49 AM	#10
nyrfan Let's go Rangers! Drives: 13' AGM 2SS/RS L99 Join Date: Jun 2011 Location: Orlando, FL Posts: 10,742 View My Garage	Get a ported TB, that will "help" with the lag. __________________ Soprano 4/1/00-6/14/11, Gone but NEVER forgotten! FSP tuned: 377/389

04-12-2013, 07:05 AM	#2
the_fast_one Drives: 2017 red hot zl1 Join Date: May 2012 Location: IL Posts: 857	The lag is probably due to the stability control. Your probably breaking the tires loose a little.

04-12-2013, 07:14 AM	#3
Ruffrider51 Drives: Victory Red 2011 2SS W/RS package Join Date: Feb 2013 Location: Houston Tx Posts: 53 View My Garage	Stability control or AFM maybe ?

04-12-2013, 07:19 AM	#4
Hannibal Drives: Camaro SS & ZL1 Join Date: Sep 2011 Location: Southeast USA Posts: 527	AFM is usually the issue. There is a noted lag when the car has to switch from 4 cyl to 8 cyl.

04-12-2013, 07:33 AM	#6
BrianT Drives: 2011 Camaro SS L99 Join Date: Jun 2012 Location: Murphy, Tx Posts: 23	It's not AFM, it happens with and without the tune. The tune turned off AFM. It's definitely not breaking the tires loose, it would need to repsond to do that. When this happens, just like on other drive by wire cars, there is no response to the throttle for at least a whole second. Then it goes like mad.

04-12-2013, 07:53 AM	#11
BrianT Drives: 2011 Camaro SS L99 Join Date: Jun 2012 Location: Murphy, Tx Posts: 23	I'll check the MAF, after researching that, it could be part of it. The car has the CAI cold air, Dynatech full length headers cat back exhaust, with the Janetty tune. When I asked Janetty what was done in the tune he did for me, he mentioned Torque Management, but he didn't say what he did to it.

04-12-2013, 07:55 AM	#12
BrianT Drives: 2011 Camaro SS L99 Join Date: Jun 2012 Location: Murphy, Tx Posts: 23	It doesn't seem to be slow to downshift.

04-12-2013, 08:05 AM	#13
Hannibal Drives: Camaro SS & ZL1 Join Date: Sep 2011 Location: Southeast USA Posts: 527	I would call Jenetty and explain the symptoms. They may have an answer for you. Also, if you have a wet filter on your CIA and that oil gets all over the MAF, you'll have problems similar to this. It's worth a look too.

04-12-2013, 08:15 AM	#14
vroomapunk [COTW 5/12/14] Drives: 2012 CRT NF Cammed 2SS/RS For Sale Join Date: Oct 2011 Location: NOLA Posts: 6,115 View My Garage	If you are aggressively turning, and hitting the throttle, you are gonna break the tires loose, so if you have stabilitrak or traction control on at any level (i.e. not completely off), then it will feel like its bogging down the engine, so you keep traction __________________