Fj40 vacuum test

[KPruitt37]

We have a 1977 fj40 and just rebuilt the carb. What is a good way to test the vacuum system? And what should I buy to test the vacuum system so I can get the correct readings when tuning the carb?

 

[charliemeyer007]

I had a port to hook up my pressure vac 4" gauge I got from cleaning up chemical engineering lab at school. 20" of vacuum is enough. You need hose that doesn't suck flat.

auto vacuum gauge - Google Search

 

[1969FJ]

Fuel Pump and Vacuum Tester

Amazing deals on this Fuel Pump /Vacuum Tester at Harbor Freight. Quality tools & low prices.

www.harborfreight.com

 

[KPruitt37]

Thank you! And where is the spot to plug it in?

 

[Grayscale]

There are spots on the intake manifold for emissions that can accommodate a vac gauge tube. Usually the barbs just in front of the carb will work, but, there is a barb for fuel vapor as well.

 

[pb4ugo]

What part of Ohio are you in?

 

[KPruitt37]

Northeast Ohio, near west branch state park

 

[Green Bean]

Thank you! And where is the spot to plug it in?

There is a nifty little fitting that screws into the intake manifold. It has an easily accessible vacuum port that makes it really convenient to temporarily hook up a vacuum gauge. When not i n use, the unused vacuum port remains capped.

 

[65swb45]

There is a nifty little fitting that screws into the intake manifold. It has an easily accessible vacuum port that makes it really convenient to temporarily hook up a vacuum gauge. When not i n use, the unused vacuum port remains capped.
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…or to hook up an in-cab , dash mounted gauge that also serves as an economizer.

 

[royal cake]

…or to hook up an in-cab , dash mounted gauge that also serves as an economizer.

I still need to do that Mark - a year after driving it around!