22R (Carb'ed) vacuum jet?
#1
Registered User
Thread Starter
22R (Carb'ed) vacuum jet?
I'm in the middle of bolting my carb back on my truck and replacing all the vacuum lines, and there's this "jet" on the vacuum lines that goes to the choke breaker on the carb, you can see it in the middle of the picture here:
Anyhow, here's an up close pic of it:
Can anyone tell me what the proper name for this thing is, what function it serves, how to test it, etc? There's no markings on it beside the serial number "6J23" stamped on one side, I have no idea if it's directional, or how to test it. It's probably the original one from 27 years ago, but if I was going to replace it, I wouldn't even know what to ask the auto shop for.
I've blown/ sucked on either side of it, no air gets through it (though I know engine vacuum is higher than any vacuum I could physically pull on it). I'm going to toss it in there for now, but if someone could fill me in on its purpose, it would be much appreciated.
Anyhow, here's an up close pic of it:
Can anyone tell me what the proper name for this thing is, what function it serves, how to test it, etc? There's no markings on it beside the serial number "6J23" stamped on one side, I have no idea if it's directional, or how to test it. It's probably the original one from 27 years ago, but if I was going to replace it, I wouldn't even know what to ask the auto shop for.
I've blown/ sucked on either side of it, no air gets through it (though I know engine vacuum is higher than any vacuum I could physically pull on it). I'm going to toss it in there for now, but if someone could fill me in on its purpose, it would be much appreciated.
The following users liked this post:
gullyrat (10-22-2023)
#2
FSM states the "jet" is for the CB(Choke Breaker) system. This system slightly opens the choke valve to prevent a too rich mixture after firing when the choke is closed.
Looking at the diagram the jet appears to be like a large resonator or more like a vacuum damper if that makes sense..? It does not appear to be a check valve and the FSM states no specific direction of installation. It does provide a test for it and the CB subsystem.
"Disconnect the vacuum hose between the jet and the vacuum pipe."
"Apply vacuum to the jet and check that the choke valve slightly opens.
Hope this helps.
Looking at the diagram the jet appears to be like a large resonator or more like a vacuum damper if that makes sense..? It does not appear to be a check valve and the FSM states no specific direction of installation. It does provide a test for it and the CB subsystem.
"Disconnect the vacuum hose between the jet and the vacuum pipe."
"Apply vacuum to the jet and check that the choke valve slightly opens.
Hope this helps.
Last edited by Kiroshu; 09-27-2014 at 08:57 PM.
#4
Registered User
#5
Air bypass repair
I recently got a 1987 toyota 4x4 pickup with a 22r and a Weber carburetor. I am debating on what to do with the air bypass system: block or fix. I'd rather fix it but it stops at the ASV and the resonator is missing. Questions: what does the resonator do? Does the resonator just go to the ASV? How do I test the ASV? On top of the ASV, is that a vacuum line and where is supposed to go? The charcoal canister in the bottom left of the picture: would the large hose on that go to the resonator? Thanks!
Thread
Thread Starter
Forum
Replies
Last Post
DiZ86
Pre 84 Trucks
12
12-27-2015 09:33 PM
FS[PacNorWest]: 1984 4Runner Asian carb original
user 82300
Misc Stuff (Vehicle Related)
4
09-02-2015 08:31 PM
noosh
General Vehicle Related Topics (Non Year Related)
0
08-21-2015 03:49 AM