I have posted in the past with problems regarding my EM2
giving me wildly inconsistent
reading
with my EGT's
. The reading flash to randomly increasing numbers up to readings of 9000 degrees. I replaced the EGT
sensors and all wires/thermal couplers
to the EGT
to
no avail. The consensus has been "noise" especially since the EGT
are so low voltage. I have now run the wirers along the outside to the plane away from all other wires and still no joy.
NOW, I am having strange readings with the coolant temperature. I have not changed anything, no movement of wires etc...well, at first, I have now replaced the sender with no change. What seems to be happening
is that when the engine is not running, the coolant temperature seems about right (which is pretty close to the oil temp....my oil temps dropped quite a bit after finally
getting my oil pressure up with a new
front cover O-ring). HOWEVER, when I start up the engine the coolant temperature reading shoots up anywhere from 50 to 100 degrees higher than before I start and/or immediately
after I shut down (thus not
enough time to cool). It is also about the same amount
higher
than the oil reading. I have removed the wire from the bundled harness to minimize interference
.
I am suddenly also having an issue with the coolant pressure reading flashing to "N" intermittingly (I am guessing similiar
to the NOP
on
the tach
)
. I too have checked the wires. Nothing has been changed, the coolant temp and pressure just started happening...the EGT
has always been a problem. Again, I have now replaced
all the sening
units and wires.
Ok, while the EGT
may be somewhat secondary in use, the coolant temperature is not. I have tried various wires. Moved wires and replaced all sensors
and re-did D-sub pins.
Thoughts?
I am about two minutes away from ordering the Dynon
engine monitor( which I intend to buy eventually anyway), however, I am not thrilled at the idea
of throwing money at what may be a simple fix...and may still have problems with even with the new unit.
Thanks.
Chris