Problems with Air Grabber on 70RR

[Lucky Lar]

My Air Grabber has stopped working properly

Started opening slower & slower

Now it won’t open all the way on its own


If I bypass everything and attach a vacuum line from the fitting on the intake manifold to the air grabber valve on the hood it opens right up


If I insert the vacuum canister between the vacuum fitting on the intake manifold & the air grabber valve on the hood (still bypassing everything, switch ect.) It won’t open all the way


Do the vacuum canisters go bad?


Can the vacuum canisters be fixed ?


Also can anybody explain how the vacuum canister actually works?


Thanks, all comments would be appreciated

 

[440+6]

The vacuum canister has a one way valve on the side that connects to the manifold to hold vacuum in the can, if there is a leak you will lose vacuum.
If the solenoid under the dash loses power or becomes stuck open you will also lose vacuum, it's designed to open when you turn the ignition off so the door closes even if the switch is in the on position.
Most likely one of the two but sound like the canister, if you have a vacuum gauge connect it to the port on the canister that goes to firewall other port to engine, run engine and note vac reading, shut engine and can should hold vacuum

 

[super-bee_ski]

Great post 440+6!

 

[Lucky Lar]

The vacuum canister has a one way valve on the side that connects to the manifold to hold vacuum in the can, if there is a leak you will lose vacuum.
If the solenoid under the dash loses power or becomes stuck open you will also lose vacuum, it's designed to open when you turn the ignition off so the door closes even if the switch is in the on position.
Most likely one of the two but sound like the canister, if you have a vacuum gauge connect it to the port on the canister that goes to firewall other port to engine, run engine and note vac reading, shut engine and can should hold vacuum

I have seen 2 types of canisters one has ridges like the photo below
and the one i have is all smooth, do you know which one is correct?

 

[440+6]

Mine is smooth like this one and it's original

 

[Lucky Lar]

Mine is Smooth

Thanks

 

[Lucky Lar]

Mine is smooth like this one and it's original

View attachment 351867

Mine is smooth also
Is that brand new NOS?
And do you know where i can buy a smooth one like it?

 

[440+6]

Mine is smooth also
Is that brand new NOS?
And do you know where i can buy a smooth one like it?

I don't know where you can get one, that pic is from the gtx registry web site.

 

[Lucky Lar]

I don't know where you can get one, that pic is from the gtx registry web site.

Ok thanks for all the help

 

[440+6]

Well here's one, I'm sure others have them too, not cheap though.

https://www.herbsparts.com/proddetail.asp?prod=CSVC2

 

[Lucky Lar]

Well here's one, I'm sure others have them too, not cheap though.

https://www.herbsparts.com/proddetail.asp?prod=CSVC2

Thanks i will call them