blueskyMD
Pre-takeoff checklist
Since I had this airplane my fuel pressure gauge always vibrates right after start up.The only time it did not do it was after the engine OH in 2008 and it stayed stable but in the lower part of green arc. It lasted only 5-10 hours and since then it kept vibrating fast and went on until last annual when mechanic suggested that constant vibration will damage the gauge and suggested to OH ED fuel pump. We did OH exchange from Tempest last annual in Oct 2016. Once again it lasted about 5-10 hours and now back to constant vibration. Engine had never ran rough in its 1000+ hours of life and no other fuel related issues. I was told that its a common problem in Lance/Saratogas. Any idea whats going on and how to fix it ?