No throttle response , LS2
Thread Starter
Drifting
Joined: Jan 2010
Posts: 1,624
Likes: 48
From: Saudi Arabia
No throttle response , LS2 - SOLVED
Just drove my friend's '07 C6.
He told me he got a problem with throttle response. I drove the car , reached 75MPH. I hit the gas and no response !! It just won't downshift and stay in the same speed.
Turned off the TCS , Drove 75 and hit the gas and yes it goes.
What is the problem here ?
I saw there three options when I click the TCS button ?
Competitive
Active handling
TCS off
what are the first two ?
UPDATE ::
It turend out that one tire at the rear was swapped with the 18'' from the front.
He told me he got a problem with throttle response. I drove the car , reached 75MPH. I hit the gas and no response !! It just won't downshift and stay in the same speed.
Turned off the TCS , Drove 75 and hit the gas and yes it goes.
What is the problem here ?
I saw there three options when I click the TCS button ?
Competitive
Active handling
TCS off
what are the first two ?
UPDATE ::
It turend out that one tire at the rear was swapped with the 18'' from the front.
Last edited by Mohammed_z; Jul 9, 2012 at 04:39 AM.
Team Owner
Joined: May 2004
Posts: 82,175
Likes: 1,319
From: McKinney TX
St. Jude Donor '21-'22-'23-'24
Actually, 4 separate modes.
Traction Control
There are 4 separate modes:
1. Traction Control - On .... Active Handling - On (Engages when the car is started)
This is the default mode.
This is recommended for normal driving.
2. Traction Control - Off .... Active Handling - On (Engage with 1 push of the button)
Turning off TCS allows the rear wheels to spin, but allows the Active Handling to fully assist in skid control.
This is recommended for drag racing.
3. Traction Control - Off .... Active Handling - Reduced (Engage with 2 pushes of the button)
This is the Competitive Driving Mode which allows the rear wheels to spin, while reducing some of the input that Active Handling has to assist in skid control.
This is recommended for road racing.
4. Traction Control - Off .... Active Handling - Off (Engage by holding button for at least 5 sec.)
This may be used when the driver does not want any on-board sensor input that may effect power reduction or brake application.
No rear wheel spin or vehicle skid corrections are automatically applied.
Note: The Anti-Lock Braking System (ABS) is always on and is unaffected by the various Traction Control or Active Handling selections that may be made above.
There are 4 separate modes:
1. Traction Control - On .... Active Handling - On (Engages when the car is started)
This is the default mode.
This is recommended for normal driving.
2. Traction Control - Off .... Active Handling - On (Engage with 1 push of the button)
Turning off TCS allows the rear wheels to spin, but allows the Active Handling to fully assist in skid control.
This is recommended for drag racing.
3. Traction Control - Off .... Active Handling - Reduced (Engage with 2 pushes of the button)
This is the Competitive Driving Mode which allows the rear wheels to spin, while reducing some of the input that Active Handling has to assist in skid control.
This is recommended for road racing.
4. Traction Control - Off .... Active Handling - Off (Engage by holding button for at least 5 sec.)
This may be used when the driver does not want any on-board sensor input that may effect power reduction or brake application.
No rear wheel spin or vehicle skid corrections are automatically applied.
Note: The Anti-Lock Braking System (ABS) is always on and is unaffected by the various Traction Control or Active Handling selections that may be made above.
Team Owner
Joined: Sep 2000
Posts: 25,015
Likes: 2,709
From: Far NW 'burbs of Chicago
St. Jude Donor '13
Non-standard size tires or wheels can confuse the traction system and cause that kind of behavior.
Does the Traction Control mesaage appear on the DIC at any time?
Does the Traction Control mesaage appear on the DIC at any time?
Le Mans Master
Joined: Sep 2004
Posts: 5,116
Likes: 5
From: Livonia MI
Many LS cars have charcoal emission tabs glued inside the air intake system. These have been known to come loose, laying on the MAF screen. Really not hard to check, and worthwhile having a look.
Thread Starter
Drifting
Joined: Jan 2010
Posts: 1,624
Likes: 48
From: Saudi Arabia
I dont know about the message , but what im sure of is when TCS is off the car is fine.
Will be checking throttle and maf.
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Team Owner
Joined: Sep 2000
Posts: 25,015
Likes: 2,709
From: Far NW 'burbs of Chicago
St. Jude Donor '13
Thread Starter
Drifting
Joined: Jan 2010
Posts: 1,624
Likes: 48
From: Saudi Arabia
CF Senior Member
Joined: Feb 2006
Posts: 23,313
Likes: 25
From: Tucson Arizona
Do not use mis-matched, different size wheels on the rear (or the front) of the car. The stock C6 has 18" wheels on the front and 19" wheels on the rear. Don't use an 18" wheel on one side and a 19" wheel on the opposite side. It may be neither here nor there but it sounds like the car has an automatic transmission as you mention it doesn't downshift when hitting the gas at 75mph. Corvette automatic transmissions are notorious for lag...delayed shifting (especially when downshifting). Could the problem be transmission related?
I wouldn't worry about it in normal street driving but whenever you're seriously trying to accelerate....always shutoff traction control. You don't want the system 'fighting' your efforts to accelerate.
Active handling can cut throttle response but if you're driving in a straight line (and active handling isn't displayed on the DIC) I can't see where that would be causing your problem. When the car won't accelerate is there any message or warning displayed (such as active handling) in the DIC? Have you checked for fault codes with a code reader?
Simplistically, if the problem is solved simply by shutting-off traction control the problem is eliminated. It is, however, curious that shutting-off TC eliminates the problem. With TC and AH in their normal, default mode; when driving in a straight line and neither TC or AH is actively engaging; you should not have this problem...the car still should accelerate (even with a slight delayed automatic transmission shift). Even if you can shutoff TC and make the car work correctly I tend to think there's still a problem. Good luck.
I wouldn't worry about it in normal street driving but whenever you're seriously trying to accelerate....always shutoff traction control. You don't want the system 'fighting' your efforts to accelerate.
Active handling can cut throttle response but if you're driving in a straight line (and active handling isn't displayed on the DIC) I can't see where that would be causing your problem. When the car won't accelerate is there any message or warning displayed (such as active handling) in the DIC? Have you checked for fault codes with a code reader?
Simplistically, if the problem is solved simply by shutting-off traction control the problem is eliminated. It is, however, curious that shutting-off TC eliminates the problem. With TC and AH in their normal, default mode; when driving in a straight line and neither TC or AH is actively engaging; you should not have this problem...the car still should accelerate (even with a slight delayed automatic transmission shift). Even if you can shutoff TC and make the car work correctly I tend to think there's still a problem. Good luck.
Melting Slicks
Joined: Apr 2005
Posts: 3,216
Likes: 4
From: ---Phoenix, AZ --- Boiler Up, Hammer Down!
Do not use mis-matched, different size wheels on the rear (or the front) of the car. The stock C6 has 18" wheels on the front and 19" wheels on the rear. Don't use an 18" wheel on one side and a 19" wheel on the opposite side. It may be neither here nor there but it sounds like the car has an automatic transmission as you mention it doesn't downshift when hitting the gas at 75mph. Corvette automatic transmissions are notorious for lag...delayed shifting (especially when downshifting). Could the problem be transmission related?
I wouldn't worry about it in normal street driving but whenever you're seriously trying to accelerate....always shutoff traction control. You don't want the system 'fighting' your efforts to accelerate.
Active handling can cut throttle response but if you're driving in a straight line (and active handling isn't displayed on the DIC) I can't see where that would be causing your problem. When the car won't accelerate is there any message or warning displayed (such as active handling) in the DIC? Have you checked for fault codes with a code reader?
Simplistically, if the problem is solved simply by shutting-off traction control the problem is eliminated. It is, however, curious that shutting-off TC eliminates the problem. With TC and AH in their normal, default mode; when driving in a straight line and neither TC or AH is actively engaging; you should not have this problem...the car still should accelerate (even with a slight delayed automatic transmission shift). Even if you can shutoff TC and make the car work correctly I tend to think there's still a problem. Good luck.
I wouldn't worry about it in normal street driving but whenever you're seriously trying to accelerate....always shutoff traction control. You don't want the system 'fighting' your efforts to accelerate.
Active handling can cut throttle response but if you're driving in a straight line (and active handling isn't displayed on the DIC) I can't see where that would be causing your problem. When the car won't accelerate is there any message or warning displayed (such as active handling) in the DIC? Have you checked for fault codes with a code reader?
Simplistically, if the problem is solved simply by shutting-off traction control the problem is eliminated. It is, however, curious that shutting-off TC eliminates the problem. With TC and AH in their normal, default mode; when driving in a straight line and neither TC or AH is actively engaging; you should not have this problem...the car still should accelerate (even with a slight delayed automatic transmission shift). Even if you can shutoff TC and make the car work correctly I tend to think there's still a problem. Good luck.