I intended to fly several hours on Friday and
Saturday, and had a great first flight of about 1/2
hour.  The OAT was 50 degrees, and the engine
temperatures were fantastic due to the mods, and the
cooler temperatures.

The oil never went above 160, and the coolant never
went above 180.  the engine was running good (aside
from one issue), and the plane was flying great.

When I throttled back, I noticed some roughness in the
engine, and after fiddling with the mixture a little,
I realized that I had left the 2nd EFI pump on.  As
soon as I shut off the 2nd pump, the engine smoothed
right out, and there were no further issues.

I tested the two pump issue once on the ground, but at
low power, it seemed to make no difference.

I checked the plane over for any oil leaks, parts
dangling, wings falling off, etc., and all look OK.

I went to lunch, and got more fuel, so that I could
fly for at least another hour.

I fueled up, and taxied out to runway 9 at the far end
of the airport.  About a 1 mile taxi.  When I got to
the run-up spot, I went through the check list, and
went to adjust the mixture to a richer setting for
takeoff.  When I looked at the air ratio gauge, it was
off the scale rich, with the mixture knob set at 12
o'clock.   I ran the mixture all the way CCW to lean,
and instead of dying, like it usually does, it only
turned off the top LED on the A/R gauge.

After going back to the hanger, I discovered that I
didn't have my fuel pressure gauge with me, but I did
have a 0-80 lb. sender, that I had planned on
installing for when I add the EM2 (someday).

I installed the sender, and turned on the fuel pump. It read about 90 ohms.  The sender is a 10-180 ohm
sender.  If it's linear (don't know that it is), then
it should be about 45 lbs or so of pressure.  I turned
the fuel regulator down to 80 ohms, and started it. No difference.  After adjusting down about 10 ohms at
a time, it finally ran better at about 40 ohms.  While
watching the ohm meter, I kicked on the 2nd fuel pump,
and the resistance went from 30 ohms to 90 ohms.  Not
too good.

Looks like I'm going to need a new fuel regulator.

The one I have now is a Mallory 3 port (return style),
but I think that I'll buy something other than
Mallory, since this one failed so soon.

Can someone recommend a 3 port regulator that is
working well for them ?

I remember reading about this subject a couple of
months ago, but I'm not at home, and can't find the
link to the archive search.

Thanks,

Steve Brooks (at least my turbo still works)
Cozy MK IV
Turbo Rotary