Ive recently run my Sapph 4x4 engine on the road for the first time.
I started off with no preload on the actuator, so that once i got to a good stretch of road i could check and then slowly increase the boost to normal.

With the engine running im getting about -14psi, However even with little or no preload, i expected this to rise once running but it doesn't.

First few people i spoke to said they thought the gauge was knackered so i started plans to get anoter gauge.
I took mine out and tested it with a pump and another gauge and it worked fine.
Pipework was fine (all new).

So i guess my question is, is it likely that im currently running with no boost hence the constant -14psi with no rise at all................

Should i try upping the boost to see if it'll rise on the gauge?
or is there anything i should look at or try first?

This is my first turbo engine so im still learning........