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Discussion Starter · #1 ·
He'TC-members,
I have a question!,
I have test the vacuum on the distributor(vacuum-unit),and the result was 0-hg on idle!
When the engine idle....there is no vacuum to the vacuum-unit?
Can somebody tell me how it works??.

EDDY merlin.
 

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I'm guessing that you have your distributor's vac advance connected to a ported vacuum source. A ported source will have zero vacuum until you crack the throttle.

Ported vacuum sources are higher up on the carburetor body. Manifold vacuum sources are at the base of the carburetor and will give vacuum at idle.
 

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Discussion Starter · #3 ·
Chad,I'll check this out!!!.
Which way can i check this vacuum-line to the vacuum-unit(distributor)?

Thanks a lot for your help chad!!!

EDDY merlin.
 

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Eddy,

At the carb, disconnect the vacuum line that goes from the carb to the vacuum advance unit.

Connect the hose from your vacuum tester/gauge to the port on the carb (the port that you just removed the vacuum line from).

Start the engine.

If the port on the carb that the vacuum gauge is connected to is "Ported Vacuum" there will be very little - if any, vacuum until you speed up the engine. If the port the gauge is connected to is "Manifold Vacuum", the gauge will show a reading.

The vacuum unit on the distributor will not produce any vacuum at all. It responds to vacuum from the engine.

Dan
 

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Discussion Starter · #5 ·
Thanks for the technical support Dan!!!!!

Very nice impala pics!!! :cool:


EDDY merlin.
 

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You are most welcome Eddy, thanks for the compliments on the Impala!

Dan
 
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