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08-25-2023, 05:46 PM
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#1 |
    
Drives: Track prepped 2018 Camaro ZL1 (a10) Join Date: Aug 2013
Location: Victoria B.C. Canada
Posts: 1,384
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Tachometer bouncing up and down randomly
Has anyone had their tachometer on both their driver display dash and heads up display, intermittently, bounce up and down randomly with absolutely nothing to do with how the car is actually being driven? In other words, everything sounds, and feels totally fine…
My dealership doesn’t seem to have any good ideas as to what the cost could be
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2018 ZL1; Mag 2650 and 2 inch LT Headers , every SPL suspension upgrade, MCS 2 way coilovers, sway bars, square SC3R 325's all the way around, and multiple brake cooling upgrades
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08-25-2023, 05:49 PM
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#2 |
Drives: Camaro 2SS & ZL1 Join Date: Mar 2018
Location: Oklahoma
Posts: 857
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Sounds like a tachometer sensor issue.
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2017 Camaro 2SS A8 Bright Yellow NPP MRC
2023 Camaro ZL1 A10 Radiant Red |
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08-25-2023, 06:08 PM
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#3 |
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Drives: Track prepped 2018 Camaro ZL1 (a10) Join Date: Aug 2013
Location: Victoria B.C. Canada
Posts: 1,384
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Thanks I’ll inquire about this.
For a little more information, that I kilometre bounces anywhere from 500 RPM to 4000 RPM, and sometimes it will do it for 20 minutes straight
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2018 ZL1; Mag 2650 and 2 inch LT Headers , every SPL suspension upgrade, MCS 2 way coilovers, sway bars, square SC3R 325's all the way around, and multiple brake cooling upgrades
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08-25-2023, 06:27 PM
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#4 |
 Drives: 2023 SS 1LE Sharkskin Join Date: Jun 2023
Location: MAGA MT
Posts: 282
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I've had this happen on my Toyota Tundra. Check to make sure all your grounds are good and solid. Believe it or not, a bad wheel speed sensor can also cause this.
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ΜΟΛΩΝ ΛΑΒΕ
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08-26-2023, 12:52 PM
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#5 |
 
Drives: 2022 ZL1(FEA suspension) Rapid Blue Join Date: Apr 2019
Location: Chemainus BC, Canada
Posts: 489
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..... and it continues
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08-29-2023, 08:29 AM
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#6 |
 Drives: 2015 Camaro ZL1 Join Date: Oct 2020
Location: Clinton Twp, Michigan
Posts: 249
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It's a ground issue. Double check ALL the grounds.
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08-29-2023, 08:38 AM
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#7 |
      
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 6,800
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Ground issue as mentioned above. Common on these cars.
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2016 NFG 1SS A8
Options-2SS Leather/NPP Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA |
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08-31-2023, 06:41 PM
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#8 |
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Drives: Track prepped 2018 Camaro ZL1 (a10) Join Date: Aug 2013
Location: Victoria B.C. Canada
Posts: 1,384
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Thanks. I’ll let the dealership know, they did come up with something else, apparently an internal service board on this, but I imagine checking the grounds still makes sense
*Edit* So the internal service bulletin is about taking the grounds, looks like everyone is on the same page, thanks!
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2018 ZL1; Mag 2650 and 2 inch LT Headers , every SPL suspension upgrade, MCS 2 way coilovers, sway bars, square SC3R 325's all the way around, and multiple brake cooling upgrades
Last edited by GunMetalGrey; 09-01-2023 at 04:54 AM. |
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09-05-2023, 10:33 PM
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#9 |
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ZL1 Driver
Drives: Camaro ZL1 & BMW M3/E92 Join Date: May 2009
Location: PA
Posts: 485
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There was a TSB about this if I remember.
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