P0410HC Problem
Tech Contributor
Joined: May 2008
Posts: 3,100
Likes: 17
From: Somers, CT and Clermont, FL
St. Jude Donor '09-'10-'11-'12-'13-'14-'15-'16
It's the one with the rubber 45 degree connection on the valve actuator, and small plastic hose on the other end of the rubber connector.
Last edited by Quicksilver Vert 01; Jul 13, 2012 at 03:43 PM.
Thread Starter
Race Director
Joined: May 2012
Posts: 15,766
Likes: 3,283
From: Phoenix area, AZ
Thread Starter
Race Director
Joined: May 2012
Posts: 15,766
Likes: 3,283
From: Phoenix area, AZ
Ok, the thin hose with the rubber boot only has 1 in Hg of vacuum pressure. I think there was more pressure on my arm in trying to reach that hose than in the hose itself.
Last edited by Corvette_Ed; Jul 13, 2012 at 04:17 PM.
Tech Contributor
Joined: Jan 2007
Posts: 19,470
Likes: 1,171
From: Dyer, IN
Ok, so there you go, no vacuum...the valve will not open. Time to pull the battery and tray...may have to remove the wheel well access cover as too.
Tech Contributor
Joined: Jan 2007
Posts: 19,470
Likes: 1,171
From: Dyer, IN
Tech Contributor
Joined: May 2008
Posts: 3,100
Likes: 17
From: Somers, CT and Clermont, FL
St. Jude Donor '09-'10-'11-'12-'13-'14-'15-'16
While your looking under the battery tray, also check the PCM and wiring for any acid damage.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Thread Starter
Race Director
Joined: May 2012
Posts: 15,766
Likes: 3,283
From: Phoenix area, AZ
The good news is the PCM housing and wiring looks good. I haven't taken it out and opened it up, but there is no sign of acid damage, not even so much as a flake of white dust, anywhere under the battery tray or behind the access panel.
The bad news is that every inch of the vacuum hose I could see or feel seems to be intact. The solenoid is very loose though, not that I can twist my head around far enough to get a good look at it. I was able to verify that the vacuum hose is connected.
The bad news is that every inch of the vacuum hose I could see or feel seems to be intact. The solenoid is very loose though, not that I can twist my head around far enough to get a good look at it. I was able to verify that the vacuum hose is connected.
Thread Starter
Race Director
Joined: May 2012
Posts: 15,766
Likes: 3,283
From: Phoenix area, AZ
I'm beginning to think I should just put things back together and head to LG Motorsports on Monday to have them turn the AIR system off for good. If I try tearing the quarter panel off it's going to end up damaged. I just don't have the facilities for tearing things apart much more than they already are.
Tech Contributor
Joined: Jan 2007
Posts: 19,470
Likes: 1,171
From: Dyer, IN
That would mean a trip to the parts store in a car that is now torn apart lol.
I'm beginning to think I should just put things back together and head to LG Motorsports on Monday to have them turn the AIR system off for good. If I try tearing the quarter panel off it's going to end up damaged. I just don't have the facilities for tearing things apart much more than they already are.
I'm beginning to think I should just put things back together and head to LG Motorsports on Monday to have them turn the AIR system off for good. If I try tearing the quarter panel off it's going to end up damaged. I just don't have the facilities for tearing things apart much more than they already are.
Thread Starter
Race Director
Joined: May 2012
Posts: 15,766
Likes: 3,283
From: Phoenix area, AZ
Tech Contributor
Joined: May 2008
Posts: 3,100
Likes: 17
From: Somers, CT and Clermont, FL
St. Jude Donor '09-'10-'11-'12-'13-'14-'15-'16
Thread Starter
Race Director
Joined: May 2012
Posts: 15,766
Likes: 3,283
From: Phoenix area, AZ
I've checked every bit of vacuum line I can reach and don't think I could get to much more than I already have without damaging something. At this point I think I'm just going to have the system deactivated permanently on Monday. I read in one of the linked threads that it doesn't affect the emissions any so I wouldn't have to worry about passing my annual inspection, which would be my main concern.
Thread Starter
Race Director
Joined: May 2012
Posts: 15,766
Likes: 3,283
From: Phoenix area, AZ
Thanks all for the advice and patience. I think this is the first time that I haven't been able to fix a problem from what I've found or been told here, which is kind of disappointing. At least it's a problem that has another solution, and if it's just a reprogram it shouldn't cost me much.
If nothing else I now have a vacuum guage and digital multimeter to stick in my toolbox, and verified that my PCM appears to be in great shape and has never been subjected to battery acid..
If nothing else I now have a vacuum guage and digital multimeter to stick in my toolbox, and verified that my PCM appears to be in great shape and has never been subjected to battery acid..
Tech Contributor
Joined: May 2008
Posts: 3,100
Likes: 17
From: Somers, CT and Clermont, FL
St. Jude Donor '09-'10-'11-'12-'13-'14-'15-'16
Thanks all for the advice and patience. I think this is the first time that I haven't been able to fix a problem from what I've found or been told here, which is kind of disappointing. At least it's a problem that has another solution, and if it's just a reprogram it shouldn't cost me much.
If nothing else I now have a vacuum guage and digital multimeter to stick in my toolbox, and verified that my PCM appears to be in great shape and has never been subjected to battery acid..
If nothing else I now have a vacuum guage and digital multimeter to stick in my toolbox, and verified that my PCM appears to be in great shape and has never been subjected to battery acid..
Having the Secondary AIR System tuned out from the PCM, as you plan on doing, will NOT affect your next emissions test in any way. It will also eliminate the need to replace either of the two AIR Check Valves any time in the future.
Thread Starter
Race Director
Joined: May 2012
Posts: 15,766
Likes: 3,283
From: Phoenix area, AZ
Thanks. It sucks that I wasn't able to fix it, but I think in the long run just tuning the system out of the PCM will result in fewer headaches, which is always a good thing.
Thanks again to both you and lucky for your patience and help.
Thanks again to both you and lucky for your patience and help.
Heel & Toe
Joined: Aug 2012
Posts: 20
Likes: 2
p0410hc problem
I have this same exact problem and have isolated it to a vacuum line torn in two under the battery area. This is on a 2001 Z06 that I just acquired, and someone probably tore the plastic line changing the battery. My question is where is the supply/reservoir for this vacuum feed since I have not been able to find the other half of the torn line. I have the portion coming from under the passenger inner fender and the solenoid located there. There is mention of a vacuum reservoir in the thread, where is it?
Tech Contributor
Joined: May 2008
Posts: 3,100
Likes: 17
From: Somers, CT and Clermont, FL
St. Jude Donor '09-'10-'11-'12-'13-'14-'15-'16
I have this same exact problem and have isolated it to a vacuum line torn in two under the battery area. This is on a 2001 Z06 that I just acquired, and someone probably tore the plastic line changing the battery. My question is where is the supply/reservoir for this vacuum feed since I have not been able to find the other half of the torn line.
It's not easy to see or reach it. You may have to loosen and slide the manifold forward to gain access to it.
Post #100 in the thread link below shows the thin vacuum line at it's source.
http://forums.corvetteforum.com/c5-t...k-valve-5.html
Last edited by Quicksilver Vert 01; Aug 22, 2012 at 09:12 AM. Reason: Added Link