I’ve removed all emissions on a 1974 FJ40 and can’t recall exactly how I need to hook up vacuum for the carb diaphragm, and the vacuum advance. I’ve got a vacuum port on the bottom plate below the carb, and 2 coming off the intake manifold. Need to run one to the vacuum advance, and one to carb diaphragm. Any help would be appreciated. Thanks.
1974’ FJ40 Vacuum Questions
- Thread starter DaveyB
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The carb diaphragm goes to the port driver side under the bracket, vac line to dizzy comes off passenger side carb base.
Cap the manifold ports or run one to a vacuum gauge.
EDIT: That's a vacuum retard dizzy, best to not hook any vacuum to it.
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- #3
- Thread starter
- #5
Nice, any way to do it with what I’ve got? Is that manifold vacuum that much different? I guess I could get a vacuum gauge and see. Just trying to make it easy.
You could probably drill your own hole. But it has to go in at a certain angle to a certain spot. The Pros use a special jig, as I understand it.
Ported vacuum is very different from manifold vacuum. I have a gauge for each in dash...
Also, not trying to be a pest but, wasn't there another spacer that goes between the carb base and middle section? Looking at your pics and my 10/'73 carb I don't see yours.it had a hardline for the EGR or something.
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- #9
Good to know. Thanks for the info. I’ll try running the dizzy without vacuum and see what it’s feeling like.What pighead said ^^^
Carb choke diaphragm connects to driver side bottom of carb body. Just cap your distributor diaphragm as it's vacuum retard, not advance.
Here's mine for reference. This is a 71 carb I believe.
