Hook up vacuum gauge where should i hook up my vacuum gauge hose to check proper vacuum?

Hook up vacuum gauge

Also, these readings are typical examples seen in stock engines except where noted, not absolute "drop-dead" numbers for your engine! It has been it has been nearly half a century since I last tuned an AVS Carter aka Edelbrock carb but I was under the impression that they had a variable venturi just like the Rochester QuadraJet carb.

A Tiny Bit Of Technical Stuff

Aug 25, 5. We hope you've enjoyed our little tour through the uses and meanings of vacuum readings.

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Share This Page Tweet. Aug 25, 3.

All hooks up vacuum gauge are GMT If you notice the needle slowly fluctuating between four or five inches, chances are you have an ignition-related issue. During his year career in the auto industry, he has covered a variety of races, shows, and industry events and has authored articles for multiple magazines. Switch to Hybrid Mode. With the engine running and the parking brake applied, locate ported engine vacuum.

Steady Low/Extremely Low

We're here to change all that, so follow along with us on a tour of vacuum gauge readings and we'll show you all the neat things you can do with one. The swing on the gauge is usually anywhere from 10 to 22 inches of mercury, depending on the speed of the engine.

It is looking like I should be using a 4.

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Send a private message to Big Dave. Bearing this in mind do you still believe I must have a valve timing issue?

The Gauge Face

Also, check your distributor cap and wires. Since many fuel system problems can be traced to the pumps themselves, such a tool can save a lot of troubleshooting time.

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Jun 13th, 12, Send a private message to Jackel. Apr 14th, 09 Jul 16th, 10 The hook up vacuum gauge here is to use the vacuum gauge to see how far your engine is differing from normally expected readings.

Have you by any chance changed the spring that balances engine vacuum against holding the door closed? You must log in or sign up to reply here.

Robert Tomashek is an automobile technician and educator with more than 15 years of experience. Where to hook up vacuum gauge?

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Unless the vacuum is really jumping around on the gauge, there is no reason to suspect a valve timing issue. Higher elevations may cause slightly lower readings.

With exhaust restriction, the vacuum gauge will often start in the normal range but will soon drop drastically as rpm is increased.

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BillAug 25, The readings in Scenario 1, 2 and 3 below are normal readings taken from a properly functioning engine. This means the engine is producing less power and, therefore, less vacuum.

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Whether you are installing a gauge in your vehicle or simply using a gauge under the hood, splicing into the correct vacuum line is vital to getting the right readings.

Check to make sure all vacuum hoses are connected and not leaking. Find all posts by what dating sites are free yahoo answers reno.

This a normal reading—between 17 and 22 inches of mercury.

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As mentioned the degree reading is normal for stock cammed engines. A vacuum gauge can tell as much about the internal and external workings of an engine as the combination of a voltmeter, compression gauge, stethoscope and timing light.