Vacuum Gauge - which hose to tap into?

[DOCTORBILL]

If I wanted to install a vacuum gauge on a '93 - 3 cylinder - 1.0 L
Geo Metro engine, which hose should I "Tee" into?

Is there more that one vacuum line? Some cars now have
several vacuum lines I am told - all different lines with different values.

I know where the MAP Sensor is - would that vacuum line be good
for the vacuum gauge used for monitoring gasoline use while driving
- changing gears etc?

DoctorBill

[unbe]

Originally Posted by DOCTORBILL

If I wanted to install a vacuum gauge on a '93 - 3 cylinder - 1.0 L
Geo Metro engine, which hose should I "Tee" into?

Is there more that one vacuum line? Some cars now have
several vacuum lines I am told - all different lines with different values.

I know where the MAP Sensor is - would that vacuum line be good
for the vacuum gauge used for monitoring gasoline use while driving
- changing gears etc?

DoctorBill

Doc,
Yes, I'd say the MAP (Manifold Absolute Pressure)would be a good line to use,it's manifold vacuum which has a direct relationship to fuel effeciency.Other lines on your engine that you wouldn't want to hook into might be throttle plate vacuum or some control vaccuum for EGR,etc.
Unbe

[DOCTORBILL]

Originally Posted by unbe

Doc,
Yes, I'd say the MAP (Manifold Absolute Pressure)would be a good line to use,it's manifold vacuum which has a direct relationship to fuel effeciency.Other lines on your engine that you wouldn't want to hook into might be throttle plate vacuum or some control vaccuum for EGR,etc.
Unbe

Yawold! That was my thinking too.

I just wasn't sure if maybe that vacuum line wasn't "Kosher" for
reading driving vacuum - what one should follow to get the best
mileage, etc.

Just wanted to check with the people who would know best....

Thanks.

DoctorBill