04-19-2023, 08:46 AM | #15 |
i just saw a post that rattling sound could be caused by a misalignment of the exhaust? i don't truly think I had rattling sound before putting on the mid pipe. Maybe I need to jack up the car again to put my hand on the mid pipe to see where is rattling
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04-19-2023, 09:44 AM | #16 | |
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 6,800
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Quote:
Side note, You can no longer turn off "cat warm-up" in the tune unless you have a MPVI or MPVI2 with a old software version. The feature has been removed in the last several updates. Somewhere in the 4.1x range I believe. But you can turn off rumble mode and change the NPP valve settings which helps.
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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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04-19-2023, 10:14 AM | #17 | |
Drives: 2022 Camaro 2SS A10 Join Date: Jul 2022
Location: FL
Posts: 524
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At this point.. anything will help, as the car is obnoxiously loud when it starts and I am sure it pisses my neighbors off...lol
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2022 Camaro 2SS/ Whipple 3.0 / 2"Headers/ PRC LTX Heads/ Forged Internals/LT4 fueling/ DSX Aux/
DSX Flex Fuel/ Meth Injection/ Katech 112 TB/ RotoFab Big Gulp/ Corsa NPP/ Various exterior mods |
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04-19-2023, 12:57 PM | #18 | |
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04-19-2023, 04:12 PM | #19 |
Drives: 2022 Camaro 2SS A10 Join Date: Jul 2022
Location: FL
Posts: 524
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Wang- the only advice I can give you at this point is pull fuse #51 under the hood and find out. That will leave the NPP valves open all the time. Pretty easy to put fuse back in if it does not work
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2022 Camaro 2SS/ Whipple 3.0 / 2"Headers/ PRC LTX Heads/ Forged Internals/LT4 fueling/ DSX Aux/
DSX Flex Fuel/ Meth Injection/ Katech 112 TB/ RotoFab Big Gulp/ Corsa NPP/ Various exterior mods |
04-19-2023, 05:41 PM | #20 |
That is what I did but it still has a rattling sound, so it is not from the npp valves?
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04-20-2023, 06:31 AM | #21 |
Drives: 2022 Camaro 2SS A10 Join Date: Jul 2022
Location: FL
Posts: 524
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Have you gone under the car and check all clamps (tightened) and to see if anything is rubbing which can cause a rattle? You stated you have a new Corsa axle back exhaust system, so with the valves open (fuse pulled), I doubt it could be the weak bushings for the NPP valves that is allowing the NPP valves to rattle when wide open. Corsa fixed that TB a while back, but anything is possible. I would check the other parts of the exhaust from the headers back first.
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2022 Camaro 2SS/ Whipple 3.0 / 2"Headers/ PRC LTX Heads/ Forged Internals/LT4 fueling/ DSX Aux/
DSX Flex Fuel/ Meth Injection/ Katech 112 TB/ RotoFab Big Gulp/ Corsa NPP/ Various exterior mods |
04-20-2023, 09:00 AM | #22 | ||
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 6,800
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Quote:
__________________
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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04-20-2023, 12:52 PM | #23 |
Drives: 2019 ZL1 Join Date: Jul 2019
Location: CO
Posts: 69
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The Borlas on my ZL1 does the same thing. It’s does it at stops for a second or two at idle and then it goes away.
I did the “fix” where you cut off the tabs on the valves, but no dice. I need to figure out if it’s a loose clamp, a heat shield, or the actual valves rattling.
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2019 Camaro ZL1
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