NPP question?

[Andeker]

I recently purchased a lightly used 2013 ZL1. In my haste to sound cool I instantly pulled the fuse for the flaps. I have since decided I my want "quiet" on occasion and purchased the mild2wild switch. Before installing I put the fuse in just to check things. I started the car and was instantly confused. If I'm not mistaken momentarily after startup the flaps should close, but they stay open.

Am I wrong that the flaps are supposed to be closed at idle? When vehicle off actuators movable by hand. Are there any other common ways the previous owner May have defeated them? Most obvious mod is rotofab intake, so possibly has a tune. Could a tune turn off app?

Thanks in advance.

[ZMEnow]

Originally Posted by Andeker

I recently purchased a lightly used 2013 ZL1. In my haste to sound cool I instantly pulled the fuse for the flaps. I have since decided I my want "quiet" on occasion and purchased the mild2wild switch. Before installing I put the fuse in just to check things. I started the car and was instantly confused. If I'm not mistaken momentarily after startup the flaps should close, but they stay open.

Am I wrong that the flaps are supposed to be closed at idle? When vehicle off actuators movable by hand. Are there any other common ways the previous owner May have defeated them? Most obvious mod is rotofab intake, so possibly has a tune. Could a tune turn off app?

Thanks in advance.

They are open on cold starts until warm up.

[DrkPhx]

Flaps are vacuum actuated and open at idle, close at part throttle and open at WOT. I have an exhaust controller that gives 2 options; closed at all times or factory settings. It's nice if you have headers to give a stealthier sound.

[Crash76]

I have a three way controller, open, closed, and stock

[raisingarizona]

Originally Posted by Andeker

I recently purchased a lightly used 2013 ZL1. In my haste to sound cool I instantly pulled the fuse for the flaps. I have since decided I my want "quiet" on occasion and purchased the mild2wild switch. Before installing I put the fuse in just to check things. I started the car and was instantly confused. If I'm not mistaken momentarily after startup the flaps should close, but they stay open.

Am I wrong that the flaps are supposed to be closed at idle? When vehicle off actuators movable by hand. Are there any other common ways the previous owner May have defeated them? Most obvious mod is rotofab intake, so possibly has a tune. Could a tune turn off app?

Thanks in advance.

Only the Forza controller will provide an always closed option.

[RobZL1]

Originally Posted by raisingarizona

Only the Forza controller will provide an always closed option.

That's not entirely true. It might be the only one you can purchase as a kit that does that, but you can also replace the relay and wire a 3-position switch to provide the always closed, always open, or stock options. The always closed position is great for cold starts in the morning and leaving the neighborhood.

[FasNuf]

Originally Posted by RobZL1

That's not entirely true. It might be the only one you can purchase as a kit that does that, but you can also replace the relay and wire a 3-position switch to provide the always closed, always open, or stock options. The always closed position is great for cold starts in the morning and leaving the neighborhood.

Can you PM me details on this relay?

[RobZL1]

I forgot that a relay is not required. You can do it that way, but all that's really needed is a 3-way switch that splices into one blue/yellow ground wire to control switch to ground. See this thread, posts 9, 12, and 14, and most importantly #79 and #134-139, 148, 151, 152, 160:

https://www.camaro5.com/forums/showthread.php?t=318683

The rest of the thread past #79 is pretty good, too. Shows where people have installed their switches. I like post #129, but mine was installed in the center console box by the original owner, like shown in #156. Works great, although I think I'm about to throw a SW catback on there to get a deeper tone.

[FasNuf]

You can check out my video. You don't have to wire it as complicated. It only takes 3 wires and they dont need to be very thick either. You switching a ground signal to the ECM is all.