04-26-2021, 02:15 PM | #1 |
Drives: Chevy Camaro 18’ SS 1LE Join Date: Apr 2021
Location: Mexico
Posts: 32
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18 SS 1LE RPM Surges on Idle and out of gear
I have a FBO E85 SS 1LE
My car on idle sounds cammed, it isn’t. Took out E85 and idle sounds much smoother. However when driving and I’m not in gear the RPMS will surge to about 2K and hold there. They’ll sometimes drop back down after a throttle tap or putting back in gear and releasing the clutch to where it engages. Has anyone else experienced this? Any ideas or solutions? The car pulls well, stayed beside a Z06 and M3. |
04-26-2021, 02:24 PM | #2 |
Drives: 2018 Chevrolet Camaro 2SS 1LE 6M Join Date: Jul 2019
Location: California
Posts: 283
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You did not list your mods, but a good place to start is to check for vacuum leaks. I had a leak on my MSD where the two halves go together and experienced similar symptoms.
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Bolt-ons.
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04-26-2021, 03:06 PM | #3 |
Drives: Chevy Camaro 18’ SS 1LE Join Date: Apr 2021
Location: Mexico
Posts: 32
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Rotofab, 103MM TB, MSD Manifold, 2” Headers
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04-26-2021, 04:53 PM | #4 |
Drives: 2018 Chevrolet Camaro 2SS 1LE 6M Join Date: Jul 2019
Location: California
Posts: 283
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There is an appreciable chance that your MSD intake manifold is leaking. Myself and others have experienced this leak. You can spray brake clean around the seams and if you hear a sucking sound or the idle drops when you spray, you have found your leak. If you have the ability to monitor your trims, and you have +15% or more short term fuel trims at idle, you have a vacuum leak.
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Bolt-ons.
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04-26-2021, 06:29 PM | #5 | |
Drives: Chevy Camaro 18’ SS 1LE Join Date: Apr 2021
Location: Mexico
Posts: 32
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Quote:
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04-26-2021, 10:46 PM | #6 |
Drives: 2018 Chevrolet Camaro 2SS 1LE 6M Join Date: Jul 2019
Location: California
Posts: 283
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The leak was at the rear of the manifold on the right side. The fix was to take the manifold apart and put sealer on the rubber gasket.
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Bolt-ons.
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05-01-2021, 11:40 PM | #7 |
Drives: 18 2SS 1LE NFG Join Date: Aug 2018
Location: Mansfield
Posts: 133
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I have a roto fab as well soler 95mm TB Think 100 effective and AWE Cat back and it would surge between 2k and 2800k pretty bad. Its an 18 1LE and the manual trans so you feel everything. I bought HP tuners and have been working on my MAF tune and my LTFT have gone from -20 to +- 5 and the surge is gone. Car feel better for sure with just the MAF tuning, taking my time and learning. For 299.00 the scanner and all you can see what the car is doing is worth it IMO.
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05-02-2021, 09:57 AM | #8 |
Snackbar Tuning
Drives: 2023 SGM ZL1 Join Date: Oct 2016
Location: Florida
Posts: 1,118
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95mm or larger TB require Torque adjustments for stable idle and no surging. The bigger you go the worse it is.
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05-04-2021, 09:27 PM | #9 |
Drives: Chevy Camaro 18’ SS 1LE Join Date: Apr 2021
Location: Mexico
Posts: 32
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The car is at the shop now that did the bolt-ons and tuning so I'll update you all when I get it back
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05-04-2021, 09:29 PM | #10 |
Drives: Chevy Camaro 18’ SS 1LE Join Date: Apr 2021
Location: Mexico
Posts: 32
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I'd feel comfortable hearing that from the people who did the work and everything LOL so if they give it back and say hey this 103MM tb is the reason and it wont cause no harm then I'm good.
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05-05-2021, 08:15 AM | #11 |
Drives: like an old lady Join Date: Jun 2012
Location: indiana
Posts: 2,396
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103mm sheesh
fwiw my car didn't mind the LT5 tb/msd at all. still drove like stock. i imagine the 103 is a bit much.
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2016+ camaro: everyone’s first car
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05-06-2021, 07:15 AM | #12 |
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 6,800
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Sounds like you have a vacuum leak.
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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 |
05-08-2021, 07:06 PM | #13 |
Snackbar Tuning
Drives: 2023 SGM ZL1 Join Date: Oct 2016
Location: Florida
Posts: 1,118
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05-26-2021, 11:25 PM | #14 |
Drives: Chevy Camaro 18’ SS 1LE Join Date: Apr 2021
Location: Mexico
Posts: 32
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MAF was the issue.
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FBO 18’ SS 1LE
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