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I havent flown my RV since a couple of cases of
lost data in the EC2 back in february. Spent the last few months making a bunch
of mods, some suggested by Tracy, others were things that I thought might
increase long term reliability. Also had to fix leaking fuel tanks in the
ensuing period.
Been working up toward renewing flight testing.
Engine has been running really well for the last few months. Thought that the
problem was cured, though not clear how. Then on saturday found that once
again my B controller had lost all data. Engine wouldnt run at any throttle
setting on B. Restored the B controller by copying A > B.
Last night after work ground ran the engine for
about 30 minutes at various throttle settings and it ran as good as always. Also
ran fine on the B controller.
Tonight after work I fired it up. Ran fine
initially. After about 15 minutes noted some minor surging at a couple of
throttle settings below 2000 RPM. Also noticed that in this RPM range where the
mixture had previously been fine, my mixture monitor is off the scale
lean. Slowly got worse, to the point that it wouldnt idle at what was
previously a solid 1350RPM. Couldnt get it to run at all below 1500, everything
between 1500 and about 3000 RPM pretty rough. Everything over 3000 is fine. No
idea what caused this change. I put the airplane away and walked away in
disgust. I'm back to where I was a year ago and I'm just about fed up with this
thing.
Mike Wills
RV-4 N144MW
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