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Discussion Starter · #1 ·
To start, I want to say I love this car and can't wait for the weather to improve so I can drive it a lot more frequently. But there seems to be an issue I can't get over. When I hit the gas it doesn't kick me in the ass quickly at all. Mainly from dead still or moving slowly. My girlfriends Buick Verano is more responsive! Mind you I have less than 150 miles on her and I'm trying to keep her under 4000rpm for now. But still, it feels like there's a lot of travel in the gas pedal with nothing happening. Is this a throttle response issue, or a low rpm torque issue?

Can something be done or is this normal? Does the engine protect itself until a certain period? Would love to hear your thoughts guys. Dealership says there is no recalls for my vehicle.


Auto, Z51, mag.

VIN: E5111482
 

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Car has plenty of low RPM torque when it is working correctly. Will throw you back in your seat, spin your tires at will. Has as much torque up to 4,000 RPM as a C6 Z06.

Could well be a simple item to fix, but something needs to be corrected. Despite what your dealership is initially telling you, suspect yours needing like TSB 13417 (realizing that that specific TSB does not apply to your automatic trans).

http://www.stingrayforums.com/forum...17-7-speed-manual-trans-power-adjustment.html

Good luck!
 

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zimm888, it still should even at your initial mileage feel very responsive from a stand still. The tac does have an initial 4k redline you can see that will disappear once you get to 501 miles on it. Also however, when the engine cold even if you were beyond 501 miles, it will have a temporary redline around 4k that moves up to the normal redline as the engine comes up to temperature. Possibly you are being too gingerly when feeding it gas? So if you car is warmed up and with it in Tour mode it should easily push you back in your seat even up to the limiting 4k rpm based on what I can recall from the first day with RedHot. Ask to try another Stingray at your dealer and see if it feels the same. Something does not sound normal compared to both Z51 and base Stingrays I have driven with automatics.
 
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Discussion Starter · #4 ·
There aren't really any C7's floating around in Canada, near me at least where they'd let you take one for spin, so I'll probably have to figure this out using only mine. How far do you feel you need to push the accelerator compared to your other vehicles? At what rpm do you need to wait before you feel a jump. Is there a delay perhaps changing from v4 to v8? I never had one with mds on my 5.7 Charger. I'll keep you guys posted if I figure this out, keep any advice coming as well! Thanks for the tips so far.
 

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Zimm888, to remove V4 versus V8 from the variables, just put the transmission in manual mode and shift with the paddle shifters. Put the mode selector in Sport. See how it feels up to 4000 RPMs before you shift. Is it still sluggish?
 

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Oh, one other thing... After your break-in period is over, it would be interesting to learn what your 0-60 times are.
 

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Zimm888, to remove V4 versus V8 from the variables, just put the transmission in manual mode and shift with the paddle shifters. Put the mode selector in Sport. See how it feels up to 4000 RPMs before you shift. Is it still sluggish?
Your Stingray should not (would not) be in "V4" when you are starting out. It would normally be in V8 regardless of being in manual mode or "D", especially if you are in Tour, Sport or Track Mode. If you step on the gas pedal like you intend to move out vs ease out, your Z51 should easily push you back in your seat.
 

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As we say in Texas " drive it like you stole it". You need to jump on the accelerator, but watch the tach so you don't exceed the 4000 rpm. I have a 7 speed and about 600 miles on mine and it will set you back in the seat long before you get to 4000 rpms.


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Car has plenty of low RPM torque when it is working correctly. Will throw you back in your seat, spin your tires at will. Has as much torque up to 4,000 RPM as a C6 Z06.

Could well be a simple item to fix, but something needs to be corrected. Despite what your dealership is initially telling you, suspect yours needing like TSB 13417 (realizing that that specific TSB does not apply to your automatic trans).

http://www.stingrayforums.com/forum...17-7-speed-manual-trans-power-adjustment.html

Good luck!
I too think this will address your problem. Let us know.
 

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Get the d.s trinity well worth it.
 

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As we say in Texas " drive it like you stole it". You need to jump on the accelerator, but watch the tach so you don't exceed the 4000 rpm. I have a 7 speed and about 600 miles on mine and it will set you back in the seat long before you get to 4000 rpms.


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Absolutely. It is critical to drive it somewhat hard that first few hundred miles to ensure proper ring seat or expect to use oil in the future and nor realize the engines full power potential.
 

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Did you resolve the issue as I just picked up mine on Thursday at its doing the same thing. Let me know what the problem was as my dealer told me to come back when I have 500 miles on her.


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To add a little more information - I took the car (auto) out to break it in a little by simply putting the car in manual mode and running each gear up to 3000 or so RPM just to get a feel but when I pulled onto the on ramp and gave it around half throttle, I thought for a second I was in my sons civic as it just did not have any get up and go. It seams the gas pedal must be pressed down a good 1/4 throttle from a stop to just to keep up with the flow of traffic leaving the light. From any speed if you get into the gas hard it almost sounds like it's starving for more fuel and the power is surely not there. I sold my stock 2007 c6 with 20k miles on it after I ordered the c7 and if you gave it a 1/4 throttle from a complete stop and tried to run through the gears like I described, I may have been able to hit third if that before you were letting up to avoid attracting any unwanted attention.
I really hate to have to limp along to put the miles on that the dealer has requested and was hoping someone may have an idea as I have read tons of posts on many forums leading up to the c7 checking reported problems, etc. and have not seen anything close to what I am seeing. Other than this one issue, the car is perfect and at times has too many people looking. Also I only have 40 miles or so on the car and like I said just hate driving it in what I call "transport mode".



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To add a little more information - I took the car (auto) out to break it in a little by simply putting the car in manual mode and running each gear up to 3000 or so RPM just to get a feel but when I pulled onto the on ramp and gave it around half throttle, I thought for a second I was in my sons civic as it just did not have any get up and go. It seams the gas pedal must be pressed down a good 1/4 throttle from a stop to just to keep up with the flow of traffic leaving the light. From any speed if you get into the gas hard it almost sounds like it's starving for more fuel and the power is surely not there. I sold my stock 2007 c6 with 20k miles on it after I ordered the c7 and if you gave it a 1/4 throttle from a complete stop and tried to run through the gears like I described, I may have been able to hit third if that before you were letting up to avoid attracting any unwanted attention.
I really hate to have to limp along to put the miles on that the dealer has requested and was hoping someone may have an idea as I have read tons of posts on many forums leading up to the c7 checking reported problems, etc. and have not seen anything close to what I am seeing. Other than this one issue, the car is perfect and at times has too many people looking. Also I only have 40 miles or so on the car and like I said just hate driving it in what I call "transport mode".



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Why don't you call around to a few different dealers, and ask about the TSB referenced in this thread? If you find one that will work with you, you have now found a new ally in a service department. I agree that I would also prefer to have my service done where I buy the car, but, if the service department will not be helpful, you have to go somewhere where they will be.
 

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New to the forum so Hello!

I found this thread searching for comments on a similar issue (Z51, 7 speed, NPP exhaust): in parking lots or just pulling off the line during normal driving, it feels like I need to pump the gas pedal, almost like the idle speed is too low. And the exhaust sounds odd, like the V4 valve is opening and closing. (I have sound management turned off - no idea why anyone wants a quiet vette). This is my fourth, 1 C5 and 2 C6's...never felt this before. Anyone feel like this is a problem?

Also with regards to TSB 13417: it is for wet sump vehicles (non Z51)
 

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Sorry to hear about the sluggishness of your cars guys. I can't speak to the auto part as mine is a manual however I can say that I can have mine doing 30 to 40 kms/hr in 2nd hear and if I lay into the throttle the tires will break free and the car will get loose until they get traction again. Sits you in the seat in a hurry. What you have going on definitely isn't normal.
 

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Discussion Starter · #18 ·
Now that I'm passed the break in period and have had some warmer days, I think it maybe has to do with the play/travel in the gas pedal. I just need to push down and have the pedal travel quite a bit and it'll take off. Do you guys agree this is the problem or is it something else? Like the car moves, but it should a lot sooner. I jumped in my 06' Charger R/T yesterday, it only has 340hp to the wheels and is much heavier. When I hit the gas coming out of the driveway it lunged back and chirped the tires since I'm used to the C7s throttle response now. Wonder what we can do about this, or is this something Chevy does on purpose so we sip fuel a little better?
 

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Now that I'm passed the break in period and have had some warmer days, I think it maybe has to do with the play/travel in the gas pedal. I just need to push down and have the pedal travel quite a bit and it'll take off. Do you guys agree this is the problem or is it something else? Like the car moves, but it should a lot sooner. I jumped in my 06' Charger R/T yesterday, it only has 340hp to the wheels and is much heavier. When I hit the gas coming out of the driveway it lunged back and chirped the tires since I'm used to the C7s throttle response now. Wonder what we can do about this, or is this something Chevy does on purpose so we sip fuel a little better?
I agree. Hit the gas hard and it flies, be gentle and it feels like you need to pump the gas a few times to get the revs up. Almost feels like the idle speed is just too low.
 

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Zimm888: I picked up my NRB, automatic 10 days ago and noticed the exact same issue. I've owned numerous previous Corvettes and this "lag" on acceleration is not unique. I use a Corvette specialist (County Corvette in West Chester, Pa.) and had them drive the car yesterday. He confirmed the lag in acceleration and said it can ultimately be corrected. I can't quote him exactly but he stated it had something to do with electronic interface between acceleration and the gearbox momentarily searching for the correct gear (therefore the lag). He said this was experienced on the C6's and can be totally fixed. He stated they needed more time with the C7's to calculated the exact adjustment. The expert on this is "James" at County Corvette if you want to get the explanation and understand the ultimate fix.
 
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