RV-7A owner here, with new onset of interesting issue. Setup: 2012 RV-7A, 200 hrs, IO360M1, Whirlwind constant speed prop, 2x PMags, auto spark plugs, G430W, 2x GRT AHRS. Recent replacement of failed #2 alternator.
At the tail end of a cross-country trip last night developed significant engine roughness, much more so than that with some past spark plug fouling. Engine tried to quit on descent with any power setting change. RPM indication jumped around erratically with sputtering at normal leaning levels. Landed without incident. This morning I tried clearing the plugs, then had normal run-up and mag check. Taxiing showed a marked left turn tendency and a significant left tilt of the horizon on the PFD.Horizon returned to normal after takeoff. Engine sounded good, so I took off for a loop in the pattern. Very rough with misfires above 2000 ft, so turned around and landed. Not losing any oil.
Thoughts? It's time for an oil change, and I'll change out the plugs.
Thx, Andy
At the tail end of a cross-country trip last night developed significant engine roughness, much more so than that with some past spark plug fouling. Engine tried to quit on descent with any power setting change. RPM indication jumped around erratically with sputtering at normal leaning levels. Landed without incident. This morning I tried clearing the plugs, then had normal run-up and mag check. Taxiing showed a marked left turn tendency and a significant left tilt of the horizon on the PFD.Horizon returned to normal after takeoff. Engine sounded good, so I took off for a loop in the pattern. Very rough with misfires above 2000 ft, so turned around and landed. Not losing any oil.
Thoughts? It's time for an oil change, and I'll change out the plugs.
Thx, Andy