vacuum engine troubleshooting

[j cAT]

this vacuum troubleshooting chart has helped me many times many years... simple and cheap troubleshooting and engine condition ...check

[Johncrow]

What vacuum line do you use to measure this?

[mike561]

thanks for that chart, ill make a printout of that

[silicon212]

Originally Posted by Johncrow

What vacuum line do you use to measure this?

Intake manifold vacuum. Any port on the carb/throttle body or intake manifold that is NOT "ported" or sourced ABOVE the throttle plate.