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I've been working on a cam swap and was in the process of putting everything back together today when I came across this hose and cannot figure out where it goes. The open end is underneath the brake booster but I don't see a connector anywhere. The hose goes along the driver side of the car to the front but I'm not sure what it's for. Anyone know what it's supposed to connect to? I've looked all around the brake booster but don't see a connector. Open end under brake booster Front driver side
That tube is part of the AIR system. I've attached a picture of mine. If you follow the line I'm pointing to towards the firewall, there is a tee under the brake booster.
I'm not seeing the check valve in your picture. Could be someone deleted the AIR connection but didn't remove all of the plumbing or my eyes are too tired.
Looks like it goes to the air pump, so depending on the end it either goes to the exhaust manifold/header check valve, or the air intake post filter. If you got the race headers, they wont have a port for it.
Ok, I was thinking it may be part of the AIR system. It was removed by the previous owner and I guess I didn't see the hose until now. Thanks for the help.
When I did my cam swap I took the time to remove the whole entire AIR system, and had the system tuned out of the computer. It's way cleaner that way in the engine bay, and you can do spark plug maintenance in minutes with it gone.
Last edited by Mr. Black; Apr 30, 2019 at 08:04 AM.
When I did my cam swap I took the time to remove the whole entire AIR system, and had the system tuned out of the computer. It's way cleaner that way in the engine bay, and you can do spark plug maintenance in minutes with it gone.
Damn! That's a lot of plumbing for that system! What exactly does it do and does removing it cause any issues on a car that's mostly stock? I get the idea that most remove them on modified engines.
Last edited by SLOWRYDE; Apr 30, 2019 at 06:24 PM.
Damn! That's a lot of plumbing for that system! What exactly does it do and does removing cause any issues?
Don't quote me on this but I believe it does two things and that's during cold start operations, one it helps the O2 senors get up to cycling temp quicker and two, it helps the cats light off quicker.
I will also point out that a lot of people out there confuse this system with EGR which the C5 Corvette has none of.
Removing it causes zero issues if you have the car tuned which with a cam swap you really have no choice but to do.
I did drive the car for 3 months (not daily) with the air system removed after I did my long tubes but before the cam swap and never did get any kind of CEL and I know others have pulled the fuses in the engine bay to deactivate the system.
In all sincerity though I can't answer if you will get codes or DIC messages on an untuned car long term with the air system removed. I'm sure someone in here more knowledgeable knows.
When I did my cam swap I took the time to remove the whole entire AIR system, and had the system tuned out of the computer. It's way cleaner that way in the engine bay, and you can do spark plug maintenance in minutes with it gone.
Thats what my air system looks like...a pile in a box.
Damn! That's a lot of plumbing for that system! What exactly does it do and does removing it cause any issues on a car that's mostly stock? I get the idea that most remove them on modified engines.
It puts excess air to the catalysts at startup to help with lightoff and cold start emissions. I doubt its strictly legal to do and still pass emissions. That being said, if you do a OBD only test, you can tune the monitors out, and if you do a dyno test the cats should already be hot, so it likely wouldnt be an issue. If your inspector knows the cars and does a visual inspection, and you have block off plates there, you may not get away with that.
Hose Connection Location
