06-10-2022, 05:38 AM | #1 |
Drives: Chevy Camaro Join Date: Apr 2022
Location: louisiana
Posts: 40
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Engine Movement at idle
Hello all, could anybody give me insight on what’s going on ? The car has 55k on the odo but everything mechanically and electrically checks out the only issue is every now and again when idling in the car I can feel the engine vibrate/ pulse a little hard I was thinking maybe the engine mounts… if you can help it would be much appreciated
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06-10-2022, 07:12 AM | #2 |
Drives: 2017 2SS Arctic blue fully loaded Join Date: Mar 2021
Location: SWEDEN
Posts: 880
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my 8k milage v8 is the same. i think it's normal. i did run a can of injector cleaner through the gas tank and it helped a little.
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06-10-2022, 07:37 AM | #3 | |
Drives: 2020 Camaro 2SS A10 Join Date: Jun 2018
Location: Michigan
Posts: 1,411
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Quote:
When resting at idle, the RPMS drop to 500 then back to 600 where my idle point is supposed to be. It does this intermittently, doesn't matter if the engine is cold or at running temp. Mostly does it when the engine is warming up. I can feel it when it happens, and even the idle resonance of the engine changes. I was going to post about it and I do have a video of it. Issue occurs at the beginning of the video within the first 8 seconds
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2020 Camaro 2SS A10 | Rebuilt by: CBI Street Cars | 2" SE LT Headers | 3" SE X-Pipe | 3" MBRP Axle-Back | Pri & Sec Cat Deletes | K&N Typhoon CAI | LT2 Ported | 95mm ZR1 TB | LS MSD Plug Wire Set | DOD Delete | BTR Stage I Cam | ECM, TCM & E85 |Retuned by: Justin L. | Dyno: 510 rwhp 472 rwtq
Last edited by FlukeSS; 06-10-2022 at 08:22 AM. |
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06-10-2022, 07:39 AM | #4 |
Drives: Chevy Camaro Join Date: Apr 2022
Location: louisiana
Posts: 40
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Thank you, I don’t believe it’s serious but it might just be that or worst case a new drive shaft
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06-10-2022, 07:40 AM | #5 | |
Drives: Chevy Camaro Join Date: Apr 2022
Location: louisiana
Posts: 40
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Quote:
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06-10-2022, 09:46 AM | #6 |
Drives: 2018 Camaro ZL1 Join Date: Nov 2009
Location: Central Arkansas
Posts: 1,214
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my past 3 GM trucks have done this same thing.
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2018 ZL1 M6 NGM
PPF and Ceramic coating IG: NGMZL1 2010 2SS RS --- SOLD MODS- Performance: BMR trailing arms & bushings | BMR Toe links | X-pipe | Muffler delete | Vmax ported throttle body | Apex "strong" MAS | Vararam CAI | Apex catch can | Kooks Headers | Kooks HF Cats | Dyno tuned by GPI 417 RWHP 409 FT-Lb Cosmetic: painted Zl1 rockers | Zl1 grill | AAC side markers | AAC LED backup lights | windows tint | taillight tint | JDP tow hook | all emblems blacked out | LED fogs |
06-10-2022, 09:50 AM | #7 | |
Drives: 2017 2SS Arctic blue fully loaded Join Date: Mar 2021
Location: SWEDEN
Posts: 880
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Quote:
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06-10-2022, 10:06 AM | #8 |
Drives: Wild Cherry LT1 Join Date: Dec 2016
Location: Massachusetts
Posts: 1,929
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Outside air temp, engine temp, humidity, elevation and fuel source all makes a difference. All three 6th gens have done the same thing to one degree or another, with the ZL1 idling the smoothest of all. I’ve also noticed (or imagined) things smooth out after a bit a extended Italian tune up.
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06-10-2022, 10:14 AM | #9 |
Drives: 2017 2SS Arctic blue fully loaded Join Date: Mar 2021
Location: SWEDEN
Posts: 880
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yeah i find after a good long hard run it seems to idle better. good clean out as they say.
from googling it's totaly normal. they designed them to be a bit lumpy on idle. check on the vette forums
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06-10-2022, 10:59 AM | #10 |
Drives: 2017 Camaro ZL1 Coupe Join Date: May 2016
Location: Georgia
Posts: 5,815
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My 2017 ZL1 is the same way idling until the engine warms up. You don’t have an issue in my opinion.
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ZL1 Coupe, PDR, Exposed carbon fiber hood insert, My Link with Nav, M6 6 speed and Silver Ice Metallic. Mods done: ceramic window tint, GM Accessories Camaro floor mats and Roto-Fab CAI.
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06-10-2022, 11:23 AM | #11 |
Drives: 2017 2SS, 50th pkg, M6, MRC, NPP Join Date: Jan 2016
Location: Ocean City, NJ
Posts: 3,197
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There are basically two idle scenarios:
1) cold start, open loop idle - the engine runs off a set of maps for given conditions. No feedback from oxygen sensor 2) closed loop idle - when all sensors are warmed up and ECM can rely on their feedback to adjust air/fuel mixture accordingly If your idle is fluctuating in open loop, no worries. Closed loop idle should be steady. |
06-10-2022, 11:45 AM | #12 |
Drives: 2020 Camaro 2SS A10 Join Date: Jun 2018
Location: Michigan
Posts: 1,411
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Same here, after a while it doesn't do it anymore.
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2020 Camaro 2SS A10 | Rebuilt by: CBI Street Cars | 2" SE LT Headers | 3" SE X-Pipe | 3" MBRP Axle-Back | Pri & Sec Cat Deletes | K&N Typhoon CAI | LT2 Ported | 95mm ZR1 TB | LS MSD Plug Wire Set | DOD Delete | BTR Stage I Cam | ECM, TCM & E85 |Retuned by: Justin L. | Dyno: 510 rwhp 472 rwtq
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06-10-2022, 11:47 AM | #13 | |
Drives: 2020 Camaro 2SS A10 Join Date: Jun 2018
Location: Michigan
Posts: 1,411
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Quote:
I was deciding given the mileage about doing a tune up.
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2020 Camaro 2SS A10 | Rebuilt by: CBI Street Cars | 2" SE LT Headers | 3" SE X-Pipe | 3" MBRP Axle-Back | Pri & Sec Cat Deletes | K&N Typhoon CAI | LT2 Ported | 95mm ZR1 TB | LS MSD Plug Wire Set | DOD Delete | BTR Stage I Cam | ECM, TCM & E85 |Retuned by: Justin L. | Dyno: 510 rwhp 472 rwtq
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06-10-2022, 09:11 PM | #14 | |
PKG4U
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Quote:
Maybe you could tell me why my 6th gear makes a noise and higher gears at cruising under minimal pedal application (just flowing along) one of those higher shifts tends to be very…slow to engage. Actually experience a quick jump of 50-100 rpm right before the drop in RPMs and a hard shift.. I’ve never experienced this small stutter or catch in the gears before.. doesn’t happen in manual paddle shifting. Doesn’t happen under WOT. This is also not the known 3-4 hard shift have been able to verify. Sorry to thread hijack
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2020 Camaro LT1. Bought 10/2020 | GM PERF. CAI | GM Muffler Delete (Performance Exhaust 4” tips). | SOLD 1/2022|
2018 ZL1 Summit White | Bought 1/2022 | PDR, Recaros, Carbon Dash, WeaponX Hx System, Apex SM-10 in ZLE fitment w/PS4S Mods after Warranty “Imma keep it stock” |
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