I am using D180 with a Rotax 912uls and have oil pressure running high and fluctuating from 65 to 75psi. Have checked with a wet test gauge and pressure is steady and 58psi. I have reviewed wiring and software setup and all is as specified in installation manual. Don't understand resistors but the one in line is red, black, black, black, brown as supplied with my D180. Pressure sensor is the one supplied by Rotax 456180. Before I replace sensor are their any checks to isolate the source of fluctuations and high oil pressure?
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Rotax oil pressure fluctuations
- Thread starter Hickswm
- Start date
- Joined
- Mar 23, 2005
- Messages
- 13,226
The color code for the resistor value is correct - 200 ohms, and as shown on Page 3-6 of the FlightDEK-D180 Installation Guide, the 200 ohm resistor is between the white wire of the (Rotax) oil pressure sensor and Ground.
1. Make sure you're getting 12V (from FlightDEK-D180 37-pin connector pin 15) on the Red wire.
2. Make sure the 200 ohm resistor has a good connection is the white wire of the oil pressure sensor on one end, and Ground on the other end.
One source of the fluctuations can be a crappy Ground connection for a sensor - we see this often. You might try reterminating the 200 ohm resistor's Ground connection to one of the black (Ground) wires on the FlightDEK-D180's 37-pin connector.
1. Make sure you're getting 12V (from FlightDEK-D180 37-pin connector pin 15) on the Red wire.
2. Make sure the 200 ohm resistor has a good connection is the white wire of the oil pressure sensor on one end, and Ground on the other end.
One source of the fluctuations can be a crappy Ground connection for a sensor - we see this often. You might try reterminating the 200 ohm resistor's Ground connection to one of the black (Ground) wires on the FlightDEK-D180's 37-pin connector.
I am using D180 with a Rotax 912uls and have oil pressure running high and fluctuating from 65 to 75psi. Have checked with a wet test gauge and pressure is steady and 58psi. I have reviewed wiring and software setup and all is as specified in installation manual. Don't understand resistors but the one in line is red, black, black, black, brown as supplied with my D180. Pressure sensor is the one supplied by Rotax 456180. Before I replace sensor are their any checks to isolate the source of fluctuations and high oil pressure?
Hi Hickswm,
It may not be the Dynon.
Four things that I see cause this all the time is a bad ground, bad sender, loose connection or you still have the old oil pressure regulator ball bearing in place and not the new mushroom regulator, spring and plug screw.
It may not be the Dynon.
Four things that I see cause this all the time is a bad ground, bad sender, loose connection or you still have the old oil pressure regulator ball bearing in place and not the new mushroom regulator, spring and plug screw.