Low Fuel Pressure Reading on Skyview

[wayne4242]

Nearly finished installing the Skyview with 1 last anomaly...  Fuel pressure from a VDO 30psi pressure sender on a Jabiru 3300 reading on the Skyview Display is about 1/2 what it should be.  Using a fully separate meter, I get what I should (around 4 psi at idle, dropping to about 3.6psi when throttle is opened to 2,000rpm).  The Skyview sub-menu is set to the correct 30psi sensor.  Any ideas on why my Skyview would be displaying 2.2psi at idle, dropping to around 0.6 at 2,000rpm and 0.0 as soon as WOT is applied?

 

[Dynon]

What's the exact reading of the characterization that you have selected for that sensor in SkyView? Also, what are the physical markings on the side of the sensor (on the nut face)?

 

[wayne4242]

I'll check both of those when I'm next down at the field ....  In the meantime I'll exercise the VDO sender unit by blowing air into it at various pressures to make sure I get a full scale of readings right up to 30psi.  The unit has been in storage for 5 years while I built the plane - so perhaps it needs some exercise ....  If that fails I'll buy a new unit.  But I will check both the selected setting on the Skyview and the stamped codes on the sender unit.

 

[Dynon]

Those two questions are designed to tease out which physical hardware and software config you have. If you have either the sensor set incorrectly for your hardware, or have the opposite sensor of what you should (carb vs fuel injected), you'll see exactly these effects.