[Z06] Tech Help! anyone had thier exhaust NPP solenoid Fail on thier Z06
01-23-2015, 03:14 PM
#1
Burning Brakes
Thread Starter
Tech Help! anyone had thier exhaust NPP solenoid Fail on thier Z06
I have a 2009 Z06 and it seems the exhaust module or soledoid in the rear stopped working. Flaps stayed open. After some diagnostics with the guys from Sunset Orange Creations it turns out there is Vacume all the way to the Vacume ball in the rear. seems its not working from there on up. I took it to the dealer and they are telling me that the ext. warranty will not cover it becaus it falls under exhaust parts which is considered ware and tear. They wanted to charge me $742 parts and labor.
Hell to the naw!
Im just going to replace it myself. Anyone done this before ?
whats the easiest way to get in there? I know the soledoid that is right behind the inner passager tailight but its hard to get to it and work on it. also where is the module? in the car?
do i need to remove the mufflers or do i need to remove the rear bumber or just the rear valance?
thanks!
RoB
Hell to the naw!
Im just going to replace it myself. Anyone done this before ?
whats the easiest way to get in there? I know the soledoid that is right behind the inner passager tailight but its hard to get to it and work on it. also where is the module? in the car?
do i need to remove the mufflers or do i need to remove the rear bumber or just the rear valance?
thanks!
RoB
01-23-2015, 03:32 PM
#2
The solenoid is a $60 - $70 part. Part number 25794609. It is number 14 on the attached diagram but usually the hoses will come with it. I bought mine on ebay.
http://www.ebay.com/itm/201041747413?_trksid=p2059210.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
You can get to it by removing the inner passenger taillight. It is under a cover that can be moved to allow access to the solenoid. There's not much room in there so you'll need to go by feel to find it. I've also attached a picture of the solenoid so you know what to feel for. You will also probably need to remove the outer passenger taillight so you can reach your other arm in there to undo the hoses that are connected to it. That's the hardest part. They're on there tight, but not clamped. Just pull them off.
http://www.ebay.com/itm/201041747413?_trksid=p2059210.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
You can get to it by removing the inner passenger taillight. It is under a cover that can be moved to allow access to the solenoid. There's not much room in there so you'll need to go by feel to find it. I've also attached a picture of the solenoid so you know what to feel for. You will also probably need to remove the outer passenger taillight so you can reach your other arm in there to undo the hoses that are connected to it. That's the hardest part. They're on there tight, but not clamped. Just pull them off.
Last edited by nhpln; 01-23-2015 at 03:34 PM.
01-24-2015, 03:53 PM
#3
Burning Brakes
Thread Starter
The solenoid is a $60 - $70 part. Part number 25794609. It is number 14 on the attached diagram but usually the hoses will come with it. I bought mine on ebay.
New Factory GM Intake Manifold Tuning Valve Solenoid Corvette C6 | eBay
You can get to it by removing the inner passenger taillight. It is under a cover that can be moved to allow access to the solenoid. There's not much room in there so you'll need to go by feel to find it. I've also attached a picture of the solenoid so you know what to feel for. You will also probably need to remove the outer passenger taillight so you can reach your other arm in there to undo the hoses that are connected to it. That's the hardest part. They're on there tight, but not clamped. Just pull them off.
New Factory GM Intake Manifold Tuning Valve Solenoid Corvette C6 | eBay
You can get to it by removing the inner passenger taillight. It is under a cover that can be moved to allow access to the solenoid. There's not much room in there so you'll need to go by feel to find it. I've also attached a picture of the solenoid so you know what to feel for. You will also probably need to remove the outer passenger taillight so you can reach your other arm in there to undo the hoses that are connected to it. That's the hardest part. They're on there tight, but not clamped. Just pull them off.
Thanks bud,
went ahead and picked up the car yesterday and ordered the solenoid. should be an easy replacement.
thanks for the info
RoB!
01-24-2015, 05:57 PM
#4
Team Owner
01-25-2015, 04:02 PM
#5
The name (intake manifold tuning valve solenoid) of the part in my original post is misleading but it is for the exhaust flaps.
The following users liked this post:
RedZ4me (03-23-2023)
02-22-2015, 10:17 AM
#10
Drifting
this just happened on mine last night, hopefully mine is the same
03-23-2023, 09:36 PM
#12
Racer
Reviving an old thread... but I have this exact problem, and I have vacuum all the way to this solonoid, and when I removed it there was a big hiss of vacuum heard. Ordered a new one from GM parts direct.. I will post results.
04-01-2023, 11:46 AM
#13
Racer
I replaced the solenoid, nada. I vacuum tested both actuator's, one held vacuum, one holds zero. It's my opinion/ fact that any vacuum leak after the solenoid, weather its a line or a fitting or an actuator will result in flaps that stay in the open/ loud position. I've got hours of diagnostic testing into my dual mode exhaust, and I'm confident in what I've stated. Swapping in a new/ proven good actuator in the next few days, I'm 99% sure this will be the solution.