Installing a vacuum gauge?

[90Haccord]

Where would be a good place to get the vaccum for installing a vaccum gauge? Tap into the intake somewhere right?


Wanting to install one to help me increase MPGs. I've seen some people saying on older cars like ours, if you can keep the vaccum pressure down thats a good indication of getting better MPG(slower acceleration).

Since we cannot use a scangauge(Obd-2), I'm thinking this is the next best thing.

[ExplodingCake]

Uhh , I don't think so. Leave the car as is.

[wed3k]

i use a vacuum guage for diagnostic purposes but if i were to install one, there's a free nipple on the back of the intake manifold which is close to the firewall.

[boostdelinquent]

You could just T the gauge hose into one of the vacumn hoses on the IM. It should be pretty straight forward.

[H22A_lude]

You could just T the gauge hose into one of the vacumn hoses on the IM. It should be pretty straight forward.

what he said

[ATS666]

It should work just fine. Just try and drive and maintain the highest vaccuum. The more you put your foot into it (opening the throttle) the vaccuum there is.

[AbsurdNY]

It should work just fine. Just try and drive and maintain the highest vaccuum. The more you put your foot into it (opening the throttle) the vaccuum there is.

You have some of that backwards. There is no vacuum at WOT. The more the throttle plate is closed, the more vacuum you have because the air the motor is pulling in cant pull it in from the throttle body. You are right about keeping the vacuum high to save gas though. I don't know why someone would need a gauge to tell when they are using more gas though. Just be light on the throttle and keep the rpm's down.