gauges stop working in diff. plane.

hello guys,
what would be the reason a gauge works in one plane (c182), but when I use it for one of my planes, which is also a single prop plane, the gauge stops working, or malfunctions?
I'm having a VOR not working, the RPM gauge doesnt reflect changes right away and the HSI starts crooked at beginning of flight, yet as soon as I rev. the engine up it goes back to horizontal.
Maybe my electrical settings in the cfg file? Suction pressure?
What gives?
thanks in advance
hector
what would be the reason a gauge works in one plane (c182), but when I use it for one of my planes, which is also a single prop plane, the gauge stops working, or malfunctions?
I'm having a VOR not working, the RPM gauge doesnt reflect changes right away and the HSI starts crooked at beginning of flight, yet as soon as I rev. the engine up it goes back to horizontal.
Maybe my electrical settings in the cfg file? Suction pressure?
What gives?
thanks in advance
hector