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Trans Am engine Vacuum line for Vacuum/Boost Gauge

This is a discussion on Trans Am engine Vacuum line for Vacuum/Boost Gauge within the General Help forums, part of the LSx Technical Help Section category; I have an electric Auto Meter Vacuum/Boost gauge. Where is a good spot to tap into the vacuum line? A ...

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    Trans Am engine Vacuum line for Vacuum/Boost Gauge

    I have an electric Auto Meter Vacuum/Boost gauge.

    Where is a good spot to tap into the vacuum line? A T fitting is already included with the Auto Meter gauge kit.

    Is this a good spot to tap into circled in red??

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    Nope. Go to the back of the intake, passenger side, and you'll find a line there. Other option is the vacuum supply to the secondary air solenoid on top of the manifold, driver side (which sources from the first option).

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    Quote Originally Posted by pajeff02 View Post
    Nope. Go to the back of the intake, passenger side, and you'll find a line there. Other option is the vacuum supply to the secondary air solenoid on top of the manifold, driver side (which sources from the first option).
    You mean all the way in the back? Do you have a picture or diagram exactly where the line is, easy to get to?

    Thank you!
    Last edited by 1batt4u; 11-09-2014 at 08:05 PM.

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    Getting ready for work right now, but if you go to the back of the engine bay, on the passenger side, it's the only small diameter vacuum line back there. I believe it connects to the MAP sensor which is plugged into the back of the intake on that side. Not easy to get to or see with the cowl...

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    I plugged my autometer vac/boost gauge in the same spot as in the picture. Is that a bad spot where I will get a false reading? It seems to register correctly for booth vac/and boost. That is where the factory uses the vacuum for the valve covers.

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    Isn't it the same vacuum line from the picture I posted, circled, going straight to back of the intake, as per a vacuum diagram I came across?

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