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  #1  
Old 02-21-2021, 02:55 PM
RV10Man RV10Man is offline
 
Join Date: Jan 2005
Location: Oklahoma City, OK
Posts: 1,105
Default ADAHRS and GU 11 succes

oops, the "M" on the GMU 11 didn't make it.
Now......if I could only figure out why I'm showing 83 psi oil pressure when the engine isn't even running.
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  #2  
Old 02-23-2021, 05:34 PM
RV10Man RV10Man is offline
 
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Location: Oklahoma City, OK
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I'm trying to figure out why the oil pressure gage is indicating 83 psi even with the engine not running. If I unplug the wire from the sensor, it will go to "0".
I've confirmed the wiring from the transducer/sender is correct to the GEA 24. the sender is the Kavlico 4055-150.
I've set the red line in the config. mode. Is there a calibration procedure to set it at zero?

I did find a couple of mistakes with some other things by accident, while searching the oil press. issue like the tach pick-up. It was in the wrong hole of the magneto.

The oil pressure is the only thing that has me concerned at this point. Any suggestions would be greatly appreciated.
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  #3  
Old 02-24-2021, 06:28 AM
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bjdecker bjdecker is offline
 
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Location: Georgetown, TX
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Sounds like you have the sense wire swapped with the ground wire on the Oil Pressure connector or at the GEA 24 -OR- you have the Vsup wired to a +12V output instead of a +5V output (J243 - Pin 18 instead of Pin 19). Check the voltage at the Oil Pressure connector.

Here's the pin-out for the SENSATA/KAVLICO sensors.

Pin A - GND (Black wire)
Pin B - Vsup (Red wire)
Pin C - Vout (Green wire)
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Retired Firmware Guy and Airplane Builder

2020 RV-14 QB -- Under construction - Tailcone & Empennage Complete.
2018 RV-7 QB -- Built, Flying
2007 RV-7 QB -- Built, Drowned, Resurrected and flying
1998 RV-8 QB -- Started, Sold
1986 Mooney 205SE
1980 Mooney 231

Aided and abetted building a number of other RV's.
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  #4  
Old 02-24-2021, 10:29 AM
RV10Man RV10Man is offline
 
Join Date: Jan 2005
Location: Oklahoma City, OK
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Quote:
Originally Posted by bjdecker View Post
Sounds like you have the sense wire swapped with the ground wire on the Oil Pressure connector or at the GEA 24 -OR- you have the Vsup wired to a +12V output instead of a +5V output (J243 - Pin 18 instead of Pin 19). Check the voltage at the Oil Pressure connector.

Here's the pin-out for the SENSATA/KAVLICO sensors.

Pin A - GND (Black wire)
Pin B - Vsup (Red wire)
Pin C - Vout (Green wire)

Thanks, I appreciate this.
I think I may have found the swapped wires. I googled G3X Kavlico oil pressure and a bunch of VAF forums showed up......from 2020. One of them was the exact scenario as mine. I did all the troubleshooting that was suggested in those old threads, and I think I actually found the problem. Just as you said, a couple of the wires from the sender to the GEA 24 were swapped. I'm showing 0 now on the OP gage. We'll see what I get now when I run the engine.
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