Roger Lee Posted November 25, 2013 Report Share Posted November 25, 2013 Ah Ha, now I know. I had this exact problem 3 years ago. I thought all this time you had a Dynon. Take a temp wire and attach it to the main grounding bolt back behind the UMA gauge on the fire wall. Them attach it to the ground up by the gauge so it is by passing the original ground. My money says your problem will go away. You're just by passing the gauge ground wire and hooking up a temporary new one that bypasses the old one to test. I spent 2 hours hunting this back then. You do have a ground to the gauge, but it is a poor one. Just add a new ground wire and forget the old one. If it works you owe me a soda when we meet. Link to comment Share on other sites More sharing options...
FlyingMonkey Posted November 25, 2013 Author Report Share Posted November 25, 2013 I will try it Roger, if it's fixed I'll buy you dinner, not just a soda! Link to comment Share on other sites More sharing options...
Gmoore7 Posted December 25, 2013 Report Share Posted December 25, 2013 Reading your comments today as I experienced low pressure readings this afternoon. Average was 35 to38, but dropped down to 25 on final. Idle moved up to 46. I feel after your comments I need to check my connections and grounds. Please let me know if you have any other thoughts. Merry Christmas friends, Link to comment Share on other sites More sharing options...
FlyingMonkey Posted December 25, 2013 Author Report Share Posted December 25, 2013 Gary, if your plane has the old style oil bypass with the round bearing, change it to the new style with the mushroom-shaped piston. That instantly fixed my pressure problems. My pressure is now 50psi all the time and never wavers once the engine is warm (until then it's 60-75psi). Link to comment Share on other sites More sharing options...
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