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Cutout problem after installing headers !!

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Old Jan 31, 2016 | 02:47 AM
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Default Cutout problem after installing headers !!

Hello guys first of all i wish u guys accept me as a new member here
im form Kuwait and i have 2014 corvette z51 package ...

i had install kooks headers with x-pipes and afe air intake .. at the dyno test it reached about 460 whp and 466 torque .

everything going perfectly but i had that cut out issue if i close the cutouts the sound goes so cool and loud on the 1-2-3 gear
when i change to 4 or 5 the soud goes like touring sound automatically
any one here had the same problem? or may help me with it i'll be thankful .
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Old Jan 31, 2016 | 09:21 AM
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Auto or manual...
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Old Jan 31, 2016 | 09:38 AM
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Npp?
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Old Jan 31, 2016 | 12:01 PM
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Originally Posted by dovervold
Auto or manual...
manual
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Old Jan 31, 2016 | 01:33 PM
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What mode do you have it in? That could causing it to close in 4th based on the rpm level.
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Old Jan 31, 2016 | 02:15 PM
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Most people have determined that the only way to keep the valves open all the time is pull the fuse. For 14's I believe it is #41. 15's and 16's #42. Plenty of threads to choose from that will also show you pictures of exactly which one to pull. Mine has been out for 2 years and never looked back...
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Old Jan 31, 2016 | 10:36 PM
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Pull the fuse.
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Old Jan 31, 2016 | 11:36 PM
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Or... you can follow Theta's thread on installing an "add a fuse" and switch and make the "Loud" switchable on anytime you want. Fantastic way to be rude and obnoxious at your demand!
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Old Jan 31, 2016 | 11:52 PM
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Originally Posted by Elite275
What mode do you have it in? That could causing it to close in 4th based on the rpm level.
it is the same in sport mode or track mode

yeah i noticed if the rpm were 1 or less the sound ok .. from 1 till the 2.5 it close automatically then above it works again
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Old Jan 31, 2016 | 11:57 PM
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Originally Posted by dovervold
Most people have determined that the only way to keep the valves open all the time is pull the fuse. For 14's I believe it is #41. 15's and 16's #42. Plenty of threads to choose from that will also show you pictures of exactly which one to pull. Mine has been out for 2 years and never looked back...
if i pulled the fuse the 5 mode's will be all the same sound you mean as if it will be always on the sport mode ?
well the sound after the headers and the X-pipes are so cool & loud but i wish if there is any other way that i can use the valves just like before
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Old Jan 31, 2016 | 11:59 PM
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Originally Posted by robert miller
Pull the fuse.
i understand that if i pull the fuse the car will be only with the loud sound right ?
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Old Feb 1, 2016 | 02:08 AM
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Mine does it in third ever since headers, until I go past 3/4 throttle then it goes to open again
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Old Feb 1, 2016 | 02:59 AM
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well its the same problem i believe ..
im not sure but i think that cuz the air pressure changed and being strong mybe this is a safety system from the car it self??

i just assumed that diagnoses im not sure if any one had an expert with this problem please help us
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Old Feb 1, 2016 | 07:45 AM
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Originally Posted by Q8c7
i understand that if i pull the fuse the car will be only with the loud sound right ?
Yes, this statement is correct.

I did as one person mentioned above and wired a switch to be able to control it manually. This way the system works like factory with the fuse in, flip the switch and it's like you pulled the fuse and the exhaust remains open all the time.
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Old Feb 1, 2016 | 03:23 PM
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Originally Posted by Elite275
Yes, this statement is correct.

I did as one person mentioned above and wired a switch to be able to control it manually. This way the system works like factory with the fuse in, flip the switch and it's like you pulled the fuse and the exhaust remains open all the time.
I'm sorry i didnt understand it well
can u explain more please
some told me here go to the factory it just needs to be programmed agian i dont know if its true either
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Old Feb 2, 2016 | 07:43 AM
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Originally Posted by Q8c7
I'm sorry i didnt understand it well
can u explain more please
some told me here go to the factory it just needs to be programmed agian i dont know if its true either
No, I don't think it needs any reprogramming. I would try first what others recommended and pull fuse 41 or 42 so you can hear what it sounds like open all of the time and make sure you are going through all gears and it sounding as you expect it to.

If that works, and you want to be able to have more control over it manually you can add a switch yourself. What this switch will do is allow your car to operate like it does when it comes from the factory in all of the modes. That is it will be quiet in Touring, open in Sport until a certain RPM level and open in Track all of the time until the RPM's drop to 1400-1700 (I can't recall the exact #). But if you flip the switch it will behave as though you pulled the fuse and the exhaust will remain open the entire time. There is a very detailed thread on here for this simple modification if it interests you.
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Old Feb 2, 2016 | 02:26 PM
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Originally Posted by Elite275
No, I don't think it needs any reprogramming. I would try first what others recommended and pull fuse 41 or 42 so you can hear what it sounds like open all of the time and make sure you are going through all gears and it sounding as you expect it to.

If that works, and you want to be able to have more control over it manually you can add a switch yourself. What this switch will do is allow your car to operate like it does when it comes from the factory in all of the modes. That is it will be quiet in Touring, open in Sport until a certain RPM level and open in Track all of the time until the RPM's drop to 1400-1700 (I can't recall the exact #). But if you flip the switch it will behave as though you pulled the fuse and the exhaust will remain open the entire time. There is a very detailed thread on here for this simple modification if it interests you.
oh i understand thanks alot my dear
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