macrafic
Well Known Member
Plane had been sitting for 3 weeks, hangered, but in the bitter cold spell we were having. Subsequently, took a flight with the temp at 3 degrees F on the ground. G3X Touch system.
Did not pay attention to gph during takeoff (my bad) but noticed that it was reading at 25 plus when I switched to cruise. I am usually expecting 15 plus on takeoff and somewhat less than that in cruise (how much depends on how I am flying: ROP or LOP, usually the latter at around 7 gph). Tried turning the electric fuel pump on and off, which only made a difference in the fuel pressure. Switched tanks to no avail. Played with various throttle settings and the high gph was consistently high throughout the range of throttle. Same with the mixture, going from ROP to LOP. Actual fuel usage seemed to be as I was expecting (which I verified when the flight was over: 9.5 gallons used in 1.5 hours of flight).
I immediately landed and taxied back to my hanger. Before shutting down, decided to run WOT one more time. Now, it seemed to be reporting correctly. So, back into the pattern I went and everything looked good. Flew another 45 minutes with no issues.
Anybody have ANY clue regarding possible causes or even additional testing I might do to isolate the issue, assuming I can reproduce the issue at some point?
Did not pay attention to gph during takeoff (my bad) but noticed that it was reading at 25 plus when I switched to cruise. I am usually expecting 15 plus on takeoff and somewhat less than that in cruise (how much depends on how I am flying: ROP or LOP, usually the latter at around 7 gph). Tried turning the electric fuel pump on and off, which only made a difference in the fuel pressure. Switched tanks to no avail. Played with various throttle settings and the high gph was consistently high throughout the range of throttle. Same with the mixture, going from ROP to LOP. Actual fuel usage seemed to be as I was expecting (which I verified when the flight was over: 9.5 gallons used in 1.5 hours of flight).
I immediately landed and taxied back to my hanger. Before shutting down, decided to run WOT one more time. Now, it seemed to be reporting correctly. So, back into the pattern I went and everything looked good. Flew another 45 minutes with no issues.
Anybody have ANY clue regarding possible causes or even additional testing I might do to isolate the issue, assuming I can reproduce the issue at some point?