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      02-11-2024, 04:37 AM   #1
vasideac
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Exhaust flap does not close

Hello friends.
Can you help me with a problem with the exhaust flaps? They are constantly open, on ISTA test they seem functional, they open/close but they always stay open and it's annoying.
Is there any coding where I can set them to only open in sport mode?
Thanks!
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      02-11-2024, 05:24 AM   #2
Qsilver7
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If you’re not the original owner…have you checked the multiple ways some owners do to keep the flap open? Some unplug the wiring connector, and some use a golf tee to keep the flap open.

Just do a google search to see the many ways to keep the flap open…then check your car to see if that’s been done. If yes, then reverse what the previous owner did.
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Last edited by Qsilver7; 02-11-2024 at 05:39 AM..
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      02-11-2024, 05:44 AM   #3
vasideac
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Quote:
Originally Posted by Qsilver7 View Post
If you’re not the original owner…have you checked the multiple ways some owners do to keep the flap open? Some unplug the wiring connector, and some use a golf tee to keep the flap open.

Just do a google search to see the many ways to keep the flap open…then check your car to see if that’s been done. If yes, then reverse what the previous owner did.
Thank you for your quick answer!
Everything worked perfectly until I replaced the dme2.
I cloned the old dme to the new one, but something happened that the flaps always stay open.
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      02-11-2024, 05:46 AM   #4
vasideac
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Ps. Flaps operate via vacuum,are not electronic
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      02-12-2024, 08:50 AM   #5
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Apologies for any confusion. But not having any of your vehicle info other than M6 Competition...I didn't have much to go on when looking up information. There are two rear exhausts listed in the parts database. I simply (and obviously incorrectly) used my VIN to get info.

When I enter my VIN...I get this diagram which lists the electric exhaust flap:



There is another rear exhaust listed...but when I use my VIN...it is grayed out. This rear exhaust is listed as VACUUM control, exhaust flap...but the exhaust flap (#1 in the diagram) is also listed as electric valve even though it is connected to a vacuum hose (#3):

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      02-12-2024, 03:57 PM   #6
vasideac
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Quote:
Originally Posted by Qsilver7 View Post
Apologies for any confusion. But not having any of your vehicle info other than M6 Competition...I didn't have much to go on when looking up information. There are two rear exhausts listed in the parts database. I simply (and obviously incorrectly) used my VIN to get info.

When I enter my VIN...I get this diagram which lists the electric exhaust flap:



There is another rear exhaust listed...but when I use my VIN...it is grayed out. This rear exhaust is listed as VACUUM control, exhaust flap...but the exhaust flap (#1 in the diagram) is also listed as electric valve even though it is connected to a vacuum hose (#3):

Can you check my vin,
Please ? Maybe can you find something.
The car is with downpipes and is very very loud with the flaps always open.
WBS6C91040D385830
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      02-12-2024, 06:07 PM   #7
Qsilver7
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Quote:
Originally Posted by vasideac View Post
Can you check my vin,
Please ? Maybe can you find something.
The car is with downpipes and is very very loud with the flaps always open.
WBS6C91040D385830
Not sure if you saw this thread or not…but here’s a link to Flying Ace’s thread from 2017 about the exhaust flaps on his M6: https://www.6post.com/forums/showthread.php?t=1449002

And digging around using your VIN…the diagram for the vacuum controlled rear exhaust still has an electronic flap (see #1 in diagram below).

And when I pull up the wiring diagrams for the M6’s exhaust…there’s also an electronic exhaust flap in the trunk (see Y42 in the illustrations below). I’m not sure how it all works…but perhaps your down pipe install has affected one or both of these electronic devices that work with the exhaust system.
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      02-14-2024, 12:15 PM   #8
vasideac
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Quote:
Originally Posted by Qsilver7 View Post
Not sure if you saw this thread or not…but here’s a link to Flying Ace’s thread from 2017 about the exhaust flaps on his M6: https://www.6post.com/forums/showthread.php?t=1449002

And digging around using your VIN…the diagram for the vacuum controlled rear exhaust still has an electronic flap (see #1 in diagram below).

And when I pull up the wiring diagrams for the M6’s exhaust…there’s also an electronic exhaust flap in the trunk (see Y42 in the illustrations below). I’m not sure how it all works…but perhaps your down pipe install has affected one or both of these electronic devices that work with the exhaust system.
Yes, you are right! I will change the elect. valve, maybe it’s defect.
Ps. Can you check to see if there's a fuse somewhere for that valve?
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      02-15-2024, 08:46 AM   #9
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Quote:
Originally Posted by vasideac View Post
Ps. Can you check to see if there's a fuse somewhere for that valve?
The fuse for the elec changeover valve (that's located in the trunk) is circled in green in the wiring diagram (see F135) which is a 5 amp fuse according to the diagram.

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      02-16-2024, 10:50 AM   #10
vasideac
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Quote:
Originally Posted by Qsilver7 View Post
The fuse for the elec changeover valve (that's located in the trunk) is circled in green in the wiring diagram (see F135) which is a 5 amp fuse according to the diagram.

The fuse is ok, today I replaced the valve with a new one …. But the problem is the same. I can’t understand where is the problem. Coding data are ok…
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