I am thinking it’s seeing that as 0.
Right before that video I had the valve block fully disconnected so should be empty and no air came out when disconnecting any part.

 

That is pretty far off then. I don't know the tolerance and I am sure there is some to the value. But that is a lot. I would not blame the sensor yet until wiring is looked at. So at this point I am sill leaning to a very large leak and it would have to be in the lines or reservoir. Hence the idea to cap the line going to the reservoir and seeing what pressure can be reached then. If it climbs fast then you know it was the reservoir. If not then a leak in the gallery some place or compressor issue.

 

whats the best way to cap that to test?

 

Push-connects are ideal There can be a lot of pressure fast so it has to be able to hold to the line well. Some hardware stores have a small selection of pneumatic lines, couplers, etc. 1/4" is very close to 6mm and while not ideal, would be enough for testing. Or if you happen to have some spare hose, you could use that and just vice grip clamp it closed which will damage the line.

Caps that I have are similar to this, I keep metal couplers and caps on hand for field repairs. Plastic fitting work in a pinch, but given the potential PSI reached metal 6mm fittings are best.

 

Or even these would be handy to plug right into an open line port to block it.

 

wondering if any local stores will sell

 

No clue. My local store had 1/4" stuff in stock. If you can find some 6mm hose to abuse, that may be easier for now. Maybe there is some hanging around the old compressor.

 

yeah, I have an old valve block that I could close up easily so you’re saying to close off the reservoir line that’s coming from the center valve block on the car so that we can eliminate if the leak is in the reservoir if the leak is in the reservoir and that is blocked off with the car lift off the bump stops

 

Yup. I want to see what happens with gallery pressure with it closed off. And yeah, an old valve block would probably work just fine as an and cap! They default to closed with no power.

 

progress!
so when doing this. The gallery pressure goes up to about 1000 before shutting off and saying fills to fast now.

but with the tank removed temporarily. I was able to go into the gap tool test values. And lift everything up. While it’s slow. It lifted and is sitting up now.

is slow just because it doesn’t have the tank to push more pressure or still potentially bad compressor.

it hasn’t been up for almost two years according to previous owner.