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Problem with Aftermarket Exhaust / Valve Always Open

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Old Jan 13, 2019 | 04:23 AM
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Problem with Aftermarket Exhaust / Valve Always Open

Hi Guys,

i’ve installed few month ago a 9FF valvetronic exhaust on my 997.1 TT. (Used )
i’ve noticed that from day 1, it takes some time for changing into loud mode.( 10 minutes)
but from few weeks, it doesn’t work at all ... the valve are always wide open , and there is no effect if i turn on or off the remote.
the system seems to be the same that the PSE ...

so my question, is : is this issue coming from the solenoid or it can come from another part? I ve checked, i didnt find any leak in the system.

thanks !
 
Old Jan 13, 2019 | 11:14 AM
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Hi Tgvr6

I had the same issue with my 9FF exhaust
One of the vacuum operated actuators was broken.
I do not know if you have the same actuators?

Regards Hans




 
Old Jan 13, 2019 | 11:32 AM
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Actually Yes, its the same.

i tried to close the valve with my hand, pushing on this accumulator, and for both it works.

in your case , They were able to move ?

you changed only one ? How did you find which one was broken ?
is there a place where i can purchase it ? I don’t think its a though task to replace it.

thanks for your help
 
Old Jan 13, 2019 | 07:25 PM
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Yes I could move them both.
My valves close if vacuum is applied to the actuators. The vacuum was (nearly) gone because the broken actuator one had a leak. I found out which one by squeezing (blocking) the rubber hoses.
I contacted 9FF and received under warranty a new one.

Yes you're right, its not a though task to replace them.

If your actuators are fine it could be the electrically operated vacuum switch or an electrical issue.

Hans
 
Old Jan 13, 2019 | 11:43 PM
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Originally Posted by 964hans
I found out which one by squeezing (blocking) the rubber hoses.
Thanks Hans for your answer !

you mean , i can isolate the broken actuator by clamping one hose separatly ?

Did you do change the actuator by yourself ? You need to remove the exhaust from the car ?
 
Old Jan 14, 2019 | 01:09 AM
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Yes, then your vacuum will build up so the proper working actuator (valve) will close.

Yes I changed it myself.
No you do not need to remove the exhaust from the car. If I remember well I took off the lining to have some more workspace.



 
Old Jan 14, 2019 | 08:00 AM
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Update !

i did some test , and actually, the both hoses ( after the « T » ) were pressed.

so i changed them, and now it works.

but i have a question : if i turn on into quiet mode, the valve turn right away, if i turn into loud mode, it takes a couple of minute. Is it normal ?
thanks
 
Old Jan 14, 2019 | 12:07 PM
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Couple of minutes is not normal.
Under normal vacuum and proper functioning actuators/valves they should open within a few seconds.
 
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