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Exhaust fuse removal didn’t work

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Old Nov 11, 2018 | 04:46 PM
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Default Exhaust fuse removal didn’t work

i pulled the #87 fuse on my 2019 Grand Sport. I’m confused. I thought that stoped the outside valves from closing? The valves close after a cold start and it gets quite. It also closes while I’m driving. Am I hearing the first set of valves closing on the cold start? Is there a differant fuse for the 19?
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Old Nov 11, 2018 | 05:40 PM
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Looks like Fuse #87 Exhaust Valve #2 in the front fuse box should be correct.

See page 261:

https://my.chevrolet.com/content/dam/gmownercenter/gmna/dynamic/manuals/2019/Chevrolet/Corvette/2019-chevrolet-corvette-owners-manual.pdf

Ron
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Old Nov 11, 2018 | 05:43 PM
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Well it's # 42 for the '16-'17. Mine took a "few miles" for me to notice, I like what I hear and won't go back.
JFYI, my dealer screwed me for taking the exhaust fuse out, stating I "Modified" the car and that's why
my "Evaporative Value" in the wheel well did not get power. $ 229. screw job.
So if you need service, REINSTALL.
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Old Nov 11, 2018 | 07:46 PM
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The exhaust will quiet down about 30 seconds after a cold start, even with the NPP valves open.
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Old Nov 11, 2018 | 07:52 PM
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The 2019 fuse is different. I can't recall the number off hand
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Old Nov 11, 2018 | 07:58 PM
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Originally Posted by ahero4eternity
The exhaust will quiet down about 30 seconds after a cold start, even with the NPP valves open.
So that’s normal. Cool. Now I know. Thanks!
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Old Nov 11, 2018 | 08:41 PM
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If you look at the diagrams, the fuse is in the same position, described as Exhaust Valve 2. (AFM valves are Exhaust Valve 1 - different fuse #).

2014: Front fuse box #41
2015 - 2018: # 42
2019: # 87

Ron
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Old Nov 12, 2018 | 07:07 AM
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Originally Posted by bankers1
Well it's # 42 for the '16-'17. Mine took a "few miles" for me to notice, I like what I hear and won't go back.
JFYI, my dealer screwed me for taking the exhaust fuse out, stating I "Modified" the car and that's why
my "Evaporative Value" in the wheel well did not get power. $ 229. screw job.
So if you need service, REINSTALL.
Can you elaborate on this? First I ever heard of it.
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Old Nov 12, 2018 | 10:36 AM
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I think you mean Evaporative Valve. There is usually a solenoid valve that opens the charcoal canister line to the intake manifold.

There is a fuse labelled Canister Vent:

2014 #46
2015-18 #47
2019 #97

Anyway, the Exhaust Valve 2 fuse is different from the Canister Vent fuse...

Ron
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