I’ve got a Lancair 320 and we’ve just re-installed the engine and are in the process of the annual inspection.

 

Both the fuel and the oil pressure readings on the VMS1000 display are very strange. The fuel pressure gives a reading when there is no pressure and the oil pressure reads very low. A quick check with some old steam gauges suggests the actual pressures are about right. The pressure sensors are both in the engine bay, fed with flexible hoses.

 

Is this likely to be the pressure sensors? Do they tend to misbehave? Is there an easy way to check them? Or could it be in the wiring or the display unit itself. I can’t see anything in the VMS1000 manual about calibration.

 

Any help gratefully received.

 

Thanks,

 

Nick