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Old 04-27-2018, 10:11 PM   #1
slowlypullin
 
Drives: 2017 Camaro SS 1LE
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Rough Idle
Recently I installed a flex fuel kit and longtube headers (no cats). The car was running fine up after this mods. Last week I installed a ported MSD IM and it was running fine for a few days.
Today I went on a cruise and everything was fine. As I was driving home the car started idling rough on a stop. It sounds as if it had an aftermarket camshaft.
What do you guys think it could be? Can the MSD cause this?

Here is a video.
https://youtu.be/1UrDNKr2u1A
Last edited by slowlypullin; 04-27-2018 at 11:07 PM.
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Old 04-27-2018, 10:22 PM   #2
Dubchitts

 
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Quote:
Originally Posted by slowlypullin View Post
Recently I installed a flex fuel kit and longtube headers (no cats). The car was running fine up after this mods. Last week I installed a ported MSD IM and it was running fine for a few days.
Today I went on a cruise and everything was fine. As I was driving home the car started idling rough on a stop. It sounds as if it had an aftermarket camshaft.
What do you guys think it could be? Can the MSD cause this?
Did you remember to plug the map sensor in on the intake manifold? I didn't get mine tight once and it idled crappy
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Old 04-27-2018, 10:45 PM   #3
slowlypullin
 
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Originally Posted by Dubchitts View Post
Did you remember to plug the map sensor in on the intake manifold? I didn't get mine tight once and it idled crappy
All the connections are good. For running e85 it smells pretty bad and my tips are black like if its running rich.
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Old 04-28-2018, 07:12 AM   #4
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Who’s doing your tuning?
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Old 04-28-2018, 08:13 AM   #5
slowlypullin
 
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Who’s doing your tuning?
Matt Sorian.
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Old 04-28-2018, 09:23 AM   #6
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Matt Sorian.
I would discuss this with him! He’s a reputable tuner.... in some people’s eyes!
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Old 04-28-2018, 12:45 PM   #7
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Wow it does sound like a cam. Keep us updated.
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2022 Vivid Orange M6 LT1 - 2" ARH headers with cats and offroad setup (full system,), 3" ARH Pure Thunder mufflers, ported MSD intake, Soler 95mm tb, Rotofab CAI, E85 flex fuel, tuned by Jason@snackbartuning, Forgestar D5 18x8 fronts with 245/40/18 and Forgestar D5 17x10 rears with 275/40/17 summer tires.

Old car 2016 M6 SS - MSD intake, Rotofab, 2" ARH headers with cats, E85 with EFI Tuning. Best ET: 11.7@122mph
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Old 04-28-2018, 12:54 PM   #8
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Double check the install for the MSD. Few times I've heard of members here who had similar idle issues with it after a few days because the bolts or something got very loose. Just needs to be re-torqued.

Or it could be the seal: https://www.camaro6.com/forums/showt...SD+idle&page=3
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Old 04-28-2018, 05:26 PM   #9
slowlypullin
 
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I think I found the problem.
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Old 04-28-2018, 05:27 PM   #10
slowlypullin
 
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Its the seal between the IM and TB
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Old 04-30-2018, 01:55 AM   #11
vince3
 
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what are we looking at?
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2022 Vivid Orange M6 LT1 - 2" ARH headers with cats and offroad setup (full system,), 3" ARH Pure Thunder mufflers, ported MSD intake, Soler 95mm tb, Rotofab CAI, E85 flex fuel, tuned by Jason@snackbartuning, Forgestar D5 18x8 fronts with 245/40/18 and Forgestar D5 17x10 rears with 275/40/17 summer tires.

Old car 2016 M6 SS - MSD intake, Rotofab, 2" ARH headers with cats, E85 with EFI Tuning. Best ET: 11.7@122mph
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Old 04-30-2018, 07:35 AM   #12
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Those are tough sometimes
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Old 04-30-2018, 09:11 AM   #13
slowlypullin
 
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what are we looking at?
Its the seal between the IM and the aluminum TB seal plate. I fixed it and the car is running fine now.
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Old 04-30-2018, 09:17 AM   #14
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Originally Posted by slowlypullin View Post
Its the seal between the IM and the aluminum TB seal plate. I fixed it and the car is running fine now.
I know you had to fix it but I was kinda digging the idle sounds you had before.
I'm glad you found the problem and it was an easy fix.
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