RVG8tor
Well Known Member
Along about my 50th hour my plane started to have high oil pressure on the first flight of the day. The first time happened on takeoff, I went around the pattern and landed. I took the cowling off and looked over things and suspected a bad sender, I still had the Dynon single wire sender. Suspecting the sender I went and flew and not alarms.
I had already bought the newer 3 wire sender when I had a pad fuel pressure sender out of the box and learned Dynon no longer carries the old one wire sender. The next day I changed to the new sender then all was good for the next flight and a couple after that. Then it came back initially it would be on the first flight of the day and I would get it during takeoff, I learned to ignore it a while and it would go away eventually, I never get it on the second flight after a fuel stop.
Now I get the high pressure alarm on the ground, it pegs high or nearly so and then drops fast to normal the climbs, last flight after sitting for 2 weeks I flew for 15 minutes before it settled down to normal.
This morning after a week off it gave it to me on the run up but was normal by the time I took off.
I warm the oil before flight, usually it is 80 plus degrees. But I have flow once or twice when away from home and can't see a correlation on this one.
I have checked the wires and all are good, but I did not ohm check anything, since I don't know what numbers I should see.
It was fine the first 50 hours, perhaps something happened in the oil change, I did remove and check the oil screen on the first couple oil changes. Last time was 7 hours ago, this was at 90 hours, I can't believe I have flown this much since December!
Consumption is good, 7 hours and only down a half quart since the last oil change.
Inflight after it settles down I have 80 psi and 180 degrees for oil parameters.
Flew today and after the run up all was good for two hops.
If anyone has any ideas I would really appreciate any help.
I had already bought the newer 3 wire sender when I had a pad fuel pressure sender out of the box and learned Dynon no longer carries the old one wire sender. The next day I changed to the new sender then all was good for the next flight and a couple after that. Then it came back initially it would be on the first flight of the day and I would get it during takeoff, I learned to ignore it a while and it would go away eventually, I never get it on the second flight after a fuel stop.
Now I get the high pressure alarm on the ground, it pegs high or nearly so and then drops fast to normal the climbs, last flight after sitting for 2 weeks I flew for 15 minutes before it settled down to normal.
This morning after a week off it gave it to me on the run up but was normal by the time I took off.
I warm the oil before flight, usually it is 80 plus degrees. But I have flow once or twice when away from home and can't see a correlation on this one.
I have checked the wires and all are good, but I did not ohm check anything, since I don't know what numbers I should see.
It was fine the first 50 hours, perhaps something happened in the oil change, I did remove and check the oil screen on the first couple oil changes. Last time was 7 hours ago, this was at 90 hours, I can't believe I have flown this much since December!
Consumption is good, 7 hours and only down a half quart since the last oil change.
Inflight after it settles down I have 80 psi and 180 degrees for oil parameters.
Flew today and after the run up all was good for two hops.
If anyone has any ideas I would really appreciate any help.