ron sterba
Well Known Member
Flying RV9A with 11 hours and noticed when I turned the master switch on #4 EGT reading is absent with a red line through the zero value. I replaced the spade connectors at the probe leads at the harness that goes to the ems unit. Same problem,value still X out. I made sure the clamp was tighten to max on exhaust pipe but still the X out. Since the # 4 CHT was only 8 degrees from the other CHTs and the engine was running smooth that I would take a flight. I was in the pattern after my takeoff and noticed that # 4 EGT was working and 12-15 degrees from the other 3 cylinders temps. I later landed after a hour flight and #4 EGT WAS STILL WORKING when I shut down. I thought it fixed itself cool!! (NOT) because when I went to the hangar the next day and turned on the master switch just to see the ambient temp readings on EGT,CHT AND OIL temps that #4 EGT was X out again. This is where I need your thoughts and suggestions. One question I have is,,,, is there a grounding issue with the probe clamp on the exhaust pipe?
Always appreciate your help.
Cheers
Ron in Oregon RV9A
Always appreciate your help.
Cheers
Ron in Oregon RV9A