npp stuck open
05-17-2013, 01:31 PM
#1
6th Gear
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npp stuck open
I have a 2007 C6 with factory installed (from 2008) npp exhaust. Up until a week or so ago, the remote fob opened and closed the system with no problem. Now, the flaps are stuck open. Any suggestions?
05-17-2013, 01:37 PM
#3
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Battery in remote FOB bad.
Vacuum hose broken or disconnected.
Remote device for FOB has blown fuse and in open position last for vacuum.
Lack of vacuum opens the NPP
Elmer
05-17-2013, 01:44 PM
#5
. Just factory NPP, installed by you or a shop 
. Just saying. Possible causes are listed on post #3; you'll have to investigate. Good luck.
05-17-2013, 01:53 PM
#6
Safety Car
replace fob battery
05-17-2013, 03:38 PM
#8
Team Owner
In diagnosing, it's like Elmer said, the natural, default state is open. Vacuum from a running engine can be used to close the valves, but a lack of any input leaves them open.