Acceleration delay jerk
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Acceleration delay jerk
I've had my auto 2015 Z51 for only a few months now. I often experience a delay in acceleration that results in a slight jerk. It doesn't happen every time I press the pedal, but sometime the car acts as if it takes a small amount of time for it to register that I pressed on the pedal before it catches up and kind of jerks forward. I've also noticed that if I'm in traffic or in a situation where I'm constantly accelerating and then letting off of the pedal, sometimes after I let off it will kind of jerk. Has anybody experience these things? Is this normal in these Vettes or is this something that can be remedied? I appreciate your help!
Racer
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From: Houston Texas
I have a 2018 Z06 A8. Since new, there is some sensitive combination of braking to a near stop (at a red light for example) and just as the car nears the stop, the light turns green and I push the accelerator. The car (on some frequency) does just what you describe. It's not every time, but it's often. Irritating, but not as irritating as taking it to a dealer and listening to them tell me they couldn't duplicate the issue.
Melting Slicks
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From: Central Commiefornia
Unsure if this is what you're experiencing, but a common problem with the C7 LT1 engine is its mushy, indistinct low end throttle response that makes pulling away from a stop a chore in the M7 equipped cars. There are a couple of solutions, including an electronic throttle remapping accessory and replacing the throttle body with the Soler version. I chose to replace the TB and the response is much improved.
Last edited by jimmbbo; Nov 14, 2019 at 07:08 PM.
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I have noticed that mine (A6) hesitates on occasion when I push the throttle down to engage the passing gears. Haven't taken it to a dealer yet. Hoping it is something that can be remedied easily.
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Long story short check out this thread.
https://www.corvetteforum.com/forums...round-1-a.html
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I've had my auto 2015 Z51 for only a few months now. I often experience a delay in acceleration that results in a slight jerk. It doesn't happen every time I press the pedal, but sometime the car acts as if it takes a small amount of time for it to register that I pressed on the pedal before it catches up and kind of jerks forward. I've also noticed that if I'm in traffic or in a situation where I'm constantly accelerating and then letting off of the pedal, sometimes after I let off it will kind of jerk. Has anybody experience these things? Is this normal in these Vettes or is this something that can be remedied? I appreciate your help!
We are positive that part of what you are describing is related to the throttle blade being near the home position where it abruptly changes airflow and the pedal map is purposely lethargic in that region too. We have solutions for both of these. With a more transitional Throttle body design and a throttle controller to take care of the pedal part. Both very easy to install (15 min) and warranty safe. Please visit our site or give us a call, we'll be happy to listen to what's going on an perhaps help you with a solution.
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Soler Performance LLC
support@solerengineering.com
www.solerengineering.com
(251) 468-9786
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From: In a parallel universe. Currently own 2014 Stingray Coupe.
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Mike - on my '14 A6, when I go to engage the passing gears, I have a stumble then the car takes off when the car downshifts. Is this something that your modified throttle body would solve or could it be something else that is causing the delay in response? Thanks.
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From: South Alabama
Now, even if you had a perfect A6, there are other sources of delay that we address with the TB and the TC. There is certainty/predictability that is to be gained with the TB when doing passing maneuvers. We welcome you to try them and find out, we'll take them back unconditionally, pre-paid returns and full refund. It will just take half hour of your time to find out.
Last edited by Mike@SolerEngr; Nov 16, 2019 at 10:19 AM. Reason: typo
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Christopher, by now you might probably know that our A8 are a bit problematic and they do jerk from time to time when shifting. If you were to drive in manual mode and keep the same gear while you are doing that maneuver does it still jerk?
We are positive that part of what you are describing is related to the throttle blade being near the home position where it abruptly changes airflow and the pedal map is purposely lethargic in that region too. We have solutions for both of these. With a more transitional Throttle body design and a throttle controller to take care of the pedal part. Both very easy to install (15 min) and warranty safe. Please visit our site or give us a call, we'll be happy to listen to what's going on an perhaps help you with a solution.
We are positive that part of what you are describing is related to the throttle blade being near the home position where it abruptly changes airflow and the pedal map is purposely lethargic in that region too. We have solutions for both of these. With a more transitional Throttle body design and a throttle controller to take care of the pedal part. Both very easy to install (15 min) and warranty safe. Please visit our site or give us a call, we'll be happy to listen to what's going on an perhaps help you with a solution.
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Dave
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I fitted both the Soler throttle body and controller this week on my 19 GS A8 and I couldn't be happier. Throttle response has drastically improved and it now feels how it should have out of the factory.
Also I need to vouch for Mike @ Soler. I live in Dubai and I have had a few questions for him along the way and he replied promptly to every one of my queries. Customer service at its best.
Last edited by C7_GrandSport_FTW; Nov 16, 2019 at 01:03 PM.
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Not sure on only using the controller alone but would hazard a guess to say it would be a definite improvement over stock.
I fitted both the Soler throttle body and controller this week on my 19 GS A8 and I couldn't be happier. Throttle response has drastically improved and it now feels how it should have out of the factory.
Also I need to vouch for Mike @ Soler. I live in Dubai and I have had a few questions for him along the way and he replied promptly to every one of my queries. Customer service at its best.
I fitted both the Soler throttle body and controller this week on my 19 GS A8 and I couldn't be happier. Throttle response has drastically improved and it now feels how it should have out of the factory.
Also I need to vouch for Mike @ Soler. I live in Dubai and I have had a few questions for him along the way and he replied promptly to every one of my queries. Customer service at its best.
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I suppose you could say that, it made the biggest difference off idle. So the first maybe 15% of throttle travel. That dulled reaction when you press the throttle is no longer there.
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Melting Slicks
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Burning Brakes
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The throttle controller mentioned here is inexpensive so I might just give it a try by itself. The TB can be added later if I want more, I suppose.
If I could figure out how to adjust the accelerator pump I would just do that, but I can't find the stupid carburetor!
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Yes, you can do either by itself. You'll see benefits either way. If you want to only do one, consider this:
TB: Controls the amount of air and the way it is allowed into the engine, it reacts better due to more power and a more linear delivery of it.
TC: Controls the TB position for a given amount pedal input, it reacts better by simulating a larger pedal depression than actual.
I think the hesitation you are talking about is in the TB territory. The way to find out is by driving manually, if you feel hesitation in M mode you either have no torque b/c the gear is too high, or b/c the pedal map is too lethargic for your taste (TC works better). If the hesitation is in automatic mode (TB works better).
Thanks everyone!
TB: Controls the amount of air and the way it is allowed into the engine, it reacts better due to more power and a more linear delivery of it.
TC: Controls the TB position for a given amount pedal input, it reacts better by simulating a larger pedal depression than actual.
I think the hesitation you are talking about is in the TB territory. The way to find out is by driving manually, if you feel hesitation in M mode you either have no torque b/c the gear is too high, or b/c the pedal map is too lethargic for your taste (TC works better). If the hesitation is in automatic mode (TB works better).
Thanks everyone!