Vacuum Gauge Install; Engine Line Tap Location

[DOFZO]

I picked up the Auto Meter Vacuum Gauge (2610). I was going to tap into the vacuum line between the PCV valve and the manifold. Is this a good location? Or is there a better line to tap into?

The gauge came with a VERY small tee and I would have to purchase a larger one in order to use the PCV valve line.

Any suggestions would be very helpful!!


Thanks.




ZO.

[3-Wheeler]

Originally Posted by DOFZO

I picked up the Auto Meter Vacuum Gauge (2610). I was going to tap into the vacuum line between the PCV valve and the manifold. Is this a good location? Or is there a better line to tap into?
.....

If you *do* tap into the harness that feeds the PCV valve, then several things:

1) keep the tap location close to the intake manifold
2) drill a small .040 inch diameter hole in the harness and tap into that small hole
3) the small hole does two things: keep the flow disturbance to a minimum, allow more air flow to the PCV valve.
4) do not restrict the harness air line to the PCV valve, as this *will* change the tuning to the PCV valve, adversely affecting how the system works.

We make PCV valves at work, so do not take this system lightly.

Jim.

[DOFZO]

Originally Posted by 3-Wheeler

If you *do* tap into the harness that feeds the PCV valve, then several things:

1) keep the tap location close to the intake manifold
2) drill a small .040 inch diameter hole in the harness and tap into that small hole
3) the small hole does two things: keep the flow disturbance to a minimum, allow more air flow to the PCV valve.
4) do not restrict the harness air line to the PCV valve, as this *will* change the tuning to the PCV valve, adversely affecting how the system works.

We make PCV valves at work, so do not take this system lightly.

Jim.

Thanks, Jim!

I will try to find another location!





ZO.

[Cobb]

Just go to advance auto and get a HELP universal vacuum t. It has a tapered design on all 3 ports and you just cut off up to the side you need. This way the vacuum meter can be connected to the 1/8 port while the pcv is on the 1/2 port.

PS, make sure the vacuum hose for the meter is facing upwards so the oil stays down in either the pcv or intake. HELL, tap in a catch can too while you are at it and put the vacuum meter closer to the intake.

[user removed]

I just used a tapered fitting and a hole in the line to the brake booster, before the check valve.

regards
Mech

[DOFZO]

Originally Posted by Old Mechanic

I just used a tapered fitting and a hole in the line to the brake booster, before the check valve.

regards
Mech

What would be an ideal location to tap into? Where/what does the brake booster look like on a Civic and which side would I want to tap?


Thanks!



ZO.

[DOFZO]

Originally Posted by DOFZO

What would be an ideal location to tap into? Where/what does the brake booster look like on a Civic and which side would I want to tap?


Thanks!



ZO.

Bump!

I have attached some pics of my engine bay. Would someone be willing to show me the best place to tap the vacuum line in at? I have zero understanding of the vacuum system components in the engine.





Edit: Would hose #18 work without creating a problem anywhere?








ZO.

[Cobb]

The thing circled in yellow is the booster. You want to tap a hose from the intake manifold that is behind the yellow line on the image. Anything between the air filter and throttle plates wont have vacuum unless the throttle is open and the air filter is really dirty.

[Cobb]

How about hose 19? Looks like the PCV I spoke of in another thread.

[user removed]

Big black metal "tank" behind the brake master cylinder is the booster. The hose runs from that to the top of the intake mainfold and the check valve is about midway on that fairly large hose (maybe an inch outside diameter). Make a small hole in that hose between the manifold and the check valve, close to the check valve so you could just shorten the hose and reattach it without any problem.

Push your metal vacuum connector in the hose until it is tight then run a hose to your gauge through one of the existing openings in the firewall.

regards
Mech