914 wastegate opening at 4600 rpm
in 912 / 914 Technical Questions
5 years ago
hi guys,
i recently removed a 914 from a gyro airframe to replace engine mounts. I disconnected the wiring at the engine sensor points.
Prior to re installing engine the 914 ran well and pulled 39.5 “Map at Wot.
I reinstalled engine, original prop, checked tcu wastegate cycle all good, started the engine and was smooth through idle to 4000rpm on ground.
During test flight max rpm 4600 achieved , 32 “map and orange tcu caution comes on. Moving throttle through to WOT you could feel wastegate open.
Landed and ground run with same results. On the ground run at 4600rpm you could see erratic/sudden opening of wastegate.
What have I done wrong? Your collective wisdom would be appreciated.
Adrian
