Stakes

I took a low speed offroad excursion due to a combination of inattention on my part and a large white SUV deciding they needed my lane; had some large rocks bounce off the undercarriage of the passenger side. Everything is fixable, no one hurt, but for some reason my stock NPP is staying open.

I checked vacuum lines to make sure none had been knocked off, but could not find anything. No Codes or Warnings on the DIC, checked the fuse, car runs fine.

Any suggestions?

NYC6

Maybe a little WD-40 on linkage?

CH-Z51

Pull the vacum lines off at the actuaters and take a vacum reading. I'm guessing its O.

Let us know what you find.


Or its a blown fuse, but I dought it.

Stakes

Will attempt in next couple of days and post answer. One of those mysteries...

nwc6

Here is a link with some exploded parts drawings that might help with locating possible disconnects of either the vacuum lines or possible the solenoid wiring..Good luck...http://forums.corvetteforum.com/c6-t...tterflies.html

0SonOfDreams

First step is simple, assuming you have the stock fuse in the exhaust spot and the car running, just pull off one of the vacuum lines and see if you have vacuum. Here is a clear shot of where the line attaches to the actuator (yours line will be slightly different but attach in the same spot)

I doubt you will have any vacuum (checking with a gauge would be best should have 14-18 HG), if you do, the actuator is damaged. If not, you either have damage to the vacuum line from the motor to the back (unlikely IMO since they are tucked away) or the solenoid located on the rear bumper support was damaged or the wires to it could have been damaged

Happy to help anyway I can

obxchartercaptain

The exhaust you show as an example look like mine with the shine BUT mine have holes on the inside.... whats the difference?

0SonOfDreams

these are Z06 mufflers, they do not have holes

CudjoeScott

And this is a problem?? I pulled my fuse immediately. No need for Mild2Wild, I'm wild all the time!

Stakes

Thank you nwc6 and SonOfDreams, great info, will get to it Monday I think, a working weekend right now, and as the CudjoeScott says, it is sort of an enjoyable problem. Mainly wondered why there were no codes thrown.

Will post what is eventually found. Still under warranty and good insurance, so whatever comes up will be covered...

07MontRedcp

I remember posts stating that the holes help reduce drone.

BJK

kev1n

just wanted to subscribe to see what the problem and resolution was.

GCD1962

A $1,000+ option gimmick that is bound to cause a lot of problems as the car ages. Have your fun now and pay later !

kev1n

haha...with that logic we all might as well be driving small econo boxes. No fun, just small efficient reliable cars.

0SonOfDreams

3yrs they have been on the Z06 and no problems and no gimmick

push

Why would you ever want them closed? haha

ls3power

couldnt agree more, my fuse has been out since day one. and only two tips to clean

RPHCRMZ51

I totally

bub

Sure sopunds like a vacuum leak to me...

Better check sooner rather than later as dirt may be being sucked into the engine at the leak point...there is no inline filter nor excess flow check in the GM design I do not believe...although a vacuum leak will usually set a trouble code...

Good luck. First step is check for vacuum at actuators.

C6Whatever

good info