AIR Pump good or NO good
Thread Starter
Intermediate
Joined: Jul 2003
Posts: 28
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From: Lenexa KS
AIR Pump good or NO good
I have a 20002 Vette. I continue to get the P0410 code. I have read all I can about the code and checked most of the parts. The Air Pump comes on when engine is cold. When I remove the hose by the alternator, I feel air coming out when I put my thumb over the hose. If I do not cover the hose there is no air coming out. Should there be a strong blast of air going to the exhaust while the pump is running without my thumb on the hose?
Le Mans Master
Joined: Sep 2014
Posts: 5,278
Likes: 539
From: Kelowna BC
It's only on when cold, and I can't imagine the air flow is a lot.
That said it does have to overcome the pressure of the engine, it is forcing air into the exhaust... if nobody else answers better I could try and hook up 12V to mine in my shop to see how much air it pushes.
That said it does have to overcome the pressure of the engine, it is forcing air into the exhaust... if nobody else answers better I could try and hook up 12V to mine in my shop to see how much air it pushes.
Thread Starter
Intermediate
Joined: Jul 2003
Posts: 28
Likes: 0
From: Lenexa KS
It's only on when cold, and I can't imagine the air flow is a lot.
That said it does have to overcome the pressure of the engine, it is forcing air into the exhaust... if nobody else answers better I could try and hook up 12V to mine in my shop to see how much air it pushes.
That said it does have to overcome the pressure of the engine, it is forcing air into the exhaust... if nobody else answers better I could try and hook up 12V to mine in my shop to see how much air it pushes.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
YES!! When the engine is started from cold iron, it should run and pump air for about 90 sec. However,,,,, you have to understand that there STUFF between the hose that you are testing and the pump that may be causing your isuues.
Examine the VACUUM operated valve on the outlet of the pump that MUST open to allow air out. If that valve is not fully open because the vacuum line or the solenoid valve in the passengers fender well is not working properly, the valve may not be fully opening.
The flow of air out of the pump is pretty substantial when its working correctly.
Here is the PUMP and that vacuum operated outlet valve:
PUMP:
OUTLET CONTROL VALVE:
Also check the INLET hose and the pump inlet and make sure that it isn't damaged or clogged.
Examine the VACUUM operated valve on the outlet of the pump that MUST open to allow air out. If that valve is not fully open because the vacuum line or the solenoid valve in the passengers fender well is not working properly, the valve may not be fully opening.
The flow of air out of the pump is pretty substantial when its working correctly.
Here is the PUMP and that vacuum operated outlet valve:
PUMP:
OUTLET CONTROL VALVE:
Also check the INLET hose and the pump inlet and make sure that it isn't damaged or clogged.
Le Mans Master
Joined: Sep 2014
Posts: 5,278
Likes: 539
From: Kelowna BC
YES!! When the engine is started from cold iron, it should run and pump air for about 90 sec. However,,,,, you have to understand that there STUFF between the hose that you are testing and the pump that may be causing your isuues.
Examine the VACUUM operated valve on the outlet of the pump that MUST open to allow air out. If that valve is not fully open because the vacuum line or the solenoid valve in the passengers fender well is not working properly, the valve may not be fully opening.
The flow of air out of the pump is pretty substantial when its working correctly.
Here is the PUMP and that vacuum operated outlet valve:
PUMP:
OUTLET CONTROL VALVE:
Also check the INLET hose and the pump inlet and make sure that it isn't damaged or clogged.
Examine the VACUUM operated valve on the outlet of the pump that MUST open to allow air out. If that valve is not fully open because the vacuum line or the solenoid valve in the passengers fender well is not working properly, the valve may not be fully opening.
The flow of air out of the pump is pretty substantial when its working correctly.
Here is the PUMP and that vacuum operated outlet valve:
PUMP:
OUTLET CONTROL VALVE:
Also check the INLET hose and the pump inlet and make sure that it isn't damaged or clogged.
Side question; where does the vacuum line go to at the top side? I blocked mine off down below when I removed my AIR pump, but it'd be nice to block it off up top at the engine instead just for some tiny peace of mind...
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
You have to block it off at the Vacuum Canister /Reservoir in the passengers front wheel well:
Block it off where it comes off the vacuum line tree for the line on the solenoid above the PCM..
Block it off where it comes off the vacuum line tree for the line on the solenoid above the PCM..
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Le Mans Master
Joined: Sep 2014
Posts: 5,278
Likes: 539
From: Kelowna BC
Too bad I didn't spend a tiny bit of extra time when I was finishing my winter header install. It was ~mid/late-March, roads were clean, I was getting itchy to drive it. Oh well, good project for some time off next weekend.
Le Mans Master
Joined: Sep 2014
Posts: 5,278
Likes: 539
From: Kelowna BC
Burning Brakes
Joined: Apr 2004
Posts: 786
Likes: 46
From: Tucson, AZ
I have 2001 working pump, mounting bracket, and all hoses.
https://www.corvetteforum.com/forums...post1588486656
https://www.corvetteforum.com/forums...post1588486656
Last edited by Joshboody; Jun 24, 2015 at 05:30 PM.
Thread Starter
Intermediate
Joined: Jul 2003
Posts: 28
Likes: 0
From: Lenexa KS
I checked the Pump, Control Valve, and Solenoid and all are working. I checked the air lines and they are clean. I have no vacuum getting from intake manifold to the Solenoid. I believe the hose connecting these two is disconnected or broken. How do I get to the Vacuum Canister to see if this hose is connected. Is it by the solenoid (Passenger wheel well)? Thanks for all your help.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Remove the front passengers wheel. Back of the wheel well will be an access panel (there is also one in the drivers side (just saying) ) Remove that access panel and you will see the PCM, TAC Module and the vacuum canister and lines.
BC
BC
Thread Starter
Intermediate
Joined: Jul 2003
Posts: 28
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From: Lenexa KS
Thread Starter
Intermediate
Joined: Jul 2003
Posts: 28
Likes: 0
From: Lenexa KS
Found the problem
OK, I finally found the problem. The "Inside Car" hose is broken in two and the "Solenoid" hose is cracked. I tried to pull the Solenoid hose off the Plastic T-connecter and od course broke the plastic tip off. So, my next project is to find a T-connector for the hoses and then try to figure out how to repair the hose going to the inside of the car (it broke in the middle so I can't stretch it.
Thanks for all your help. I wanted to give an update so others my see the cause of my P0410 code.
Thanks for all your help. I wanted to give an update so others my see the cause of my P0410 code.