subpar_bucker
Well Known Member
We are about half way through the flying portion of the PAP. No major squawks so far. One issue that I am seeing though is that the first engine start of the day is requiring extensive cranking (close to the 10 second limit) before the engine eventually fires up somewhat reluctantly. It may then immediately come up to 2000 rpm, or sometimes it runs quite rough for a few seconds before finally running normally. I do not recall this issue when the weather was warmer (FYI, I'm located just north of Pittsburgh PA here in the USA).
We pulled two spark plugs (top and bottom) the other day and they looked great. I pulled the G3X logs from the test flights so far and there are no errors listed there. Nothing on the G3X during flight, so this seems like a start up issue. One of my mechanic friends said, "if this were a 78 Buick pumping the gas would get it to fire right up." Which I thought was quite funny.
I will try to make a video of it today and will call Van's support on Monday. I believe I was in the very first batch of 912iS engines Van's shipped to 12iS builders. There's no adjustable idle screw on my throttle intake. I can get the serial number if that's helpful.
One guess was there's a sensor somewhere that's not detecting the change in temperature and varying the mixture appropriately.
Any help appreciated. I searched the forums but didn't see anything that matched this issue.
-bob
PS, the engine runs great otherwise. If anything, we've been impressed by how little fuel we've gone through so far!!
We pulled two spark plugs (top and bottom) the other day and they looked great. I pulled the G3X logs from the test flights so far and there are no errors listed there. Nothing on the G3X during flight, so this seems like a start up issue. One of my mechanic friends said, "if this were a 78 Buick pumping the gas would get it to fire right up." Which I thought was quite funny.
I will try to make a video of it today and will call Van's support on Monday. I believe I was in the very first batch of 912iS engines Van's shipped to 12iS builders. There's no adjustable idle screw on my throttle intake. I can get the serial number if that's helpful.
One guess was there's a sensor somewhere that's not detecting the change in temperature and varying the mixture appropriately.
Any help appreciated. I searched the forums but didn't see anything that matched this issue.
-bob
PS, the engine runs great otherwise. If anything, we've been impressed by how little fuel we've gone through so far!!