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'06 CTS-V
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728 Posts
Discussion Starter · #1 ·
I've noticed this for a while now, but don't know if it is normal behavior. Compared to a car with a cable-operated throttle, when I accelerate hard in a gear, but then let off the gas, the RPMs are fairly slow to drop. I don't know if that's due to the electronic throttle, a very heavy flywheel, some intentional programming, or some flaw?

I mostly notice it when I hammer the gas in like 1st gear, but then shift to 3rd or 4th from there to cruise. The RPMs take longer to drop than seems normal, meaning you can't just go right to the higher gear (smoothly), you have to wait a second.

Is this normal behavior?
 

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2007 CTS-V
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612 Posts
Seems to be pretty normal for a stock V. I know mine does that. Most likely a result of the the things you mentioned, electronic throttle control + bloated flywheel.
 

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2014 CTS Vsport, 2016 Chevy SS M6
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493 Posts
I think they all do it under appropriate conditions. I've always assumed it was more emissions related.
 

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'04 CTS-V, '02 SLS
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28 Posts
Newbe here, noticed the same thing. Far as I know, car is bone stock. Kinda anoying to me, would like to know if there are any solutions. Just passed one month of ownership.

Glenn
 

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2007 CTS-V Black-on-Black
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915 Posts
how about an intermittent ZERO throttle response from blipping to downshift? i hate it
 

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'05 CTS-V, '00 SLS, 98 SLS, 89 Eldo, '80 Eldo
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4,001 Posts
Raise your hands if you have the stock flywheel and punch it. :shhh:
As of yesterday my hand will be down :yup:

Not sure about the OPs situation, but I do know if you put it in neutral and let it coast, RPMs will hang around 1500 till you get slow enough.
Just a guess, but it could possibly be built into the tune. With the heavy FW dropping from 4K to 800rpm it may be hard to get a good idle.

Tony
 

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2007 CTS-V Black-on-Black
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915 Posts
So you're saying it has a purpose, and we don't notice it until we do something out of the ordinary like go from high RPMs under load, to neutral... but all other times, the RPM hold is smoother during shifts
 

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05 Stealth Gray CTS-V, 08 Light Platinum SRX V8, 05 White Diamond STS4 V8 1SG
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2,112 Posts
how about an intermittent ZERO throttle response from blipping to downshift? i hate it
YES. I have not been totally happy with the throttle response. One day I'll get around to some tuning and down the road from there, maybe an LS7 clutch/flywheel. Then I think I'll be happy. It's a shame, though - my 95 Z28 was absolutely pleasant and satisfying in the throttle response department. Most people say the C5 Z06 is good, too, though it has a dual mass flywheel...must be lighter than ours?
 

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2007 CTS-V (Thunder Grey)
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1,667 Posts
I've noticed this for a while now, but don't know if it is normal behavior. Compared to a car with a cable-operated throttle, when I accelerate hard in a gear, but then let off the gas, the RPMs are fairly slow to drop. I don't know if that's due to the electronic throttle, a very heavy flywheel, some intentional programming, or some flaw?

I mostly notice it when I hammer the gas in like 1st gear, but then shift to 3rd or 4th from there to cruise. The RPMs take longer to drop than seems normal, meaning you can't just go right to the higher gear (smoothly), you have to wait a second.

Is this normal behavior?
Yes, it's called throttle follow-on and it is built into the tune. I am not sure if it can be gotten rid of by a tuner.

When I had my other V on the track several years ago, and did a blip and downshift, it seems like it took for ever for the RPM's to fall.
 

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791 Posts
I find the electronic throttle annoying...I'm used to coming off the gas and having the revs quickly drop, and even more annoyingly, I'm used to a more predictable response for blipping the throttle for a downshift. I guess in time I'll get used to the V, but at times I feel like I've blipped the throttle and nothing has happened.
 

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Platinum 2004 CTS-V
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4,914 Posts
It's the dual mass turd. Get rid of it asap. Not only will a lighter fw rev faster, it decels MUCH faster. Once I changed out, it made a helluva difference.

See videos for difference.......


 
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