Greetings,

I ran the engine some with the cowl on it today, and found that the EM-2,
and the old Mixture gauge read within one "bar" of each other at all times.
Both are reading almost full scale though, about 9 bars.  I didn't measure
the output with a meter, since I didn't see the point. For now, I'll
probably leave the old mixture gauge temporarily mounted, since I have so
much use for it, and the EM-2 mixture reading isn't available all the time
(on every screen).   Trying to lean enough to get a change in readings gave the same engine
surging again, but that was at only about 2500 rpms.  I tried it around
3500, and was able to turn the mixture knob all the way CCW, and reach
mid-scale on both meters.  It looks like the O2 is reading right now, and I
just need to do some tuning.  I screwed up the 15-17 MAP area the other day
trying to fix the sudden idle issue that Ed explained so well, so I'll
probably start with Tracy's defaults again tomorrow, and try to finalize the
tuning of the A controller.  B already runs well enough for it's purpose, so
I may just leave it along. The forecast is for 12 kt, direct crosswinds tomorrow, so I'll probably
stick to tuning.  Maybe the winds Sunday will be more favorable for someone
who hasn't flown in 4 months :-) On another note, particularly for Paul, I replaced my intake air hoses today
(changed "scat" tubing for "sceet" tubing).  When I had the tubes off, I
could see the blue drop of fuel that was hanging on the edge of the TB lip.
It seems that shutting off the injectors doesn't stop the drip, so I'll just
go back to killing the EC-2 power, which was my normal method before.

Cheers,
Rusty (haven't heard from John, have we)