How to replace the (p1416) air check valve??
Melting Slicks
Joined: Jul 2004
Posts: 2,340
Likes: 35
From: Folsom Lake CA
What about a ratcheting box end wrench? I didn't have one at the time, and I seem to remember also switching between a small crescent wrench or small vise grip and the socket. What about a standard socket with a swivel adapter, will that help?
Intermediate
Joined: Oct 2001
Posts: 40
Likes: 2
From: santa clara ca
P1416 another fix
I did this a couple of months ago. No need to remove intake or WD-40 enema:
https://www.corvetteforum.com/forums...other-fix.html
I expect it will take me about 30 minutes next time. the trick is to let the WD-40 soak on the threads for several minutes before unthreading the defective valve.
https://www.corvetteforum.com/forums...other-fix.html
I expect it will take me about 30 minutes next time. the trick is to let the WD-40 soak on the threads for several minutes before unthreading the defective valve.
Melting Slicks
Joined: Jul 2004
Posts: 2,340
Likes: 35
From: Folsom Lake CA
You're welcome. For clarification, did you use a standard socket or were you able to fish out your dropped swivel socket?
Intermediate
Joined: Oct 2019
Posts: 30
Likes: 7
From: New Bern, NC
Standard socket with swivel wrench inserted horizontally with just a tiny bit of space to leverage one click at a time, but enough to loosen the bolt.
After putting on the new check valve, I reinstalled the tube and tightened the bracket bolt using the same method.
Need to do another search for the lost socket.
After putting on the new check valve, I reinstalled the tube and tightened the bracket bolt using the same method.
Need to do another search for the lost socket.
Intermediate
Joined: Sep 2020
Posts: 45
Likes: 4
From: Downingtown pa
hey guys. Looks like we have a solution to the same problem I have. My only question is do we spray the carb cleaner while the engine is on or with the engine off?
[QUOTE=DNQfromMP;1560190669]Hey Bill, first off, an excellent writeup. Secondly, a couple questions for you:
Why and how is the output side of the air pump vacuum controlled?
How does the ECM know the AIR system isnt working? is there just some cold start AFR threshold, and if the AFR is richer than this threshold, then the ECM knows that the AIR system isnt working?
I disconnected my AIR system and now Ive got a check engine light. How can I get this light to shut off without taking my car to a tuner?
[QUOTE=DNQfromMP;1560190669]Hey Bill, first off, an excellent writeup. Secondly, a couple questions for you:
Why and how is the output side of the air pump vacuum controlled?
How does the ECM know the AIR system isnt working? is there just some cold start AFR threshold, and if the AFR is richer than this threshold, then the ECM knows that the AIR system isnt working?
I disconnected my AIR system and now Ive got a check engine light. How can I get this light to shut off without taking my car to a tuner?
Moderator, Tech Contributor
Joined: Sep 2013
Posts: 15,406
Likes: 3,964
From: Cape Coral, Florida
Bill has retired and we haven’t heard from him in months…a solenoid controls the vacuum going to the AIR shutoff valve and with vacuum it opens allowing the air from the pump to the exhaust manifolds…the PCM will turn on the pump and activate the solenoid and the PCM expects to see the O2 sensor voltage decrease and short term fuel trims will then increase…a lean condition is being seen…if both banks are inop you will see a P0410…a 0415 or 0416 for just one bank…you will have to get the MIL tuned out…this is done in closed loop.
