I had issues with the accuracy of the electronic version. I have now installed a manual pressure gauge.

 

I have a 30psi WIKI Hartwig. I need to fabricate a bracket instead of having it redneck zip tied to my OBD2 port.

 

Hoping never to see the maximum ! ;-)

 

If you want, I'll make you an aluminum case and send it to you.

 

Was gonna say "Hartwig is your man" but he beat me to the punch.

 

So got a few questions.

1. In the pictures I edited, for the yellow arrow that is pointing to the line that appears to run inside the cab, is that to the inside gauge? (I'll assume so)

2. What is the line for that has the blue arrow pointing to it?

3. What is the purpose of the thick rubber around the line where the red arrow is pointing?

 

I will have to get a gauge with the rear threads like yours, mine has the bottom threads. I can get what I need from work and let you know mic dimensions. Shipping from Germany might be crazy high. We have exchanged emails before, I will send you one.

 

At the end of the hose with the yellow arrow is a sensor that measures the coolant pressure for my CTS2 display. However, the value is not exactly correct, because I measure the coolant pressure and the fuel pressure on a common port of the CTS2, but this does NOT work contrary to the manufacturer's specifications, so I have installed a manual pressure gauge in addition (this is the hose with the blue arrow). The rubber (red arrow) is an anti-chafing element as the t-piece contacts my turbo intake.

 

So, since you're trying to read pressures from two different types of systems (coolant pressure and fuel pressure), aren't you concerned about some sort of cross contamination with the two systems?

For one thing, i wouldn't think that you should be mixing diesel fuel with coolant or the other way around. So if you're using the same port at your scan tool or gauge (The CTS2) and basically you are using a "T" fitting to allow both tubes/hoses to provide pressure readings from both systems at the same time, I don't know that this is a good idea.

Perhaps I'm completely wrong on this and someone that has the knowledge about this sort of thing can come in here and tell us if this is okay or not.

But, to me, I just don't see how it's a good idea to allow fuel to mix with coolant and vice versa. Sure, the amounts of either one mixing into the other may be extremely small but still, any amount I don't think would be good.

Anyway, I also can't see how the CTS2 gauge could differentiate between the two when needing to get readings but perhaps there isn't actually a "T" fitting and there are two separate fittings for each line going into the gauge. (You'll obviously have to clarify that one) Since you said the phrase "common port", I'm assuming that "common" means "shared" and as such, the two different systems are using the same port?

Anyway, I figured the rubber piece was just to protect the line against chafing like you mentioned but just wanted to be sure.

 

I believe he was using the same port on his CTS2 to read the two different pressure sensors. So both systems maintain their integrity. The two systems are NOT tied together physically. So there is no co-mingling of fluids. B.

 

Any multi-pole switch can electrically change from one sensor to another. One pressure guage can measure fuel, oil, coolant, trans, whatever.

 

Folks, I am not familiar with the CTS2.

My thinking was that this was two separate lines that measured pressure due to fluid being pushed through each line so the reading would have to be done through fluid transfer like on an analog gauge for something like oil pressure or fuel pressure through a line with fluid and so on. If this is an electronic sending unit so the readings are taken electronically, then I understand how multiple types of systems can be measured from one single switch or port. I simply didn't know that this was with wiring instead of a tube/hose/line.