It is possible you are getting frost on one plug. Moisture can enter
through open intake and exhaust valves and freeze on the
plugs. Of course this will melt as the engine warms up ending the problem.
John, A230
----- Original Message -----
From: <DJA727@aol.com>
Subject: Starting cold 914
> Hi group,
>
> I have about 3.5 hours of running time now on my 914 engine and am very
close
> to first flight. It has run very well, but now after the painting down
time,
> I have colder weather and during start and initial warm up, I am getting
> misfiring on one cylinder. That cylinder varies. I can tell because I have
a
> scanner and can see the EGT low on the cylinder that is not firing. I can
> feel it as well missing on one. Once it is warmed up, it runs like a
sewing
> machine. It has missed on #3 and on #2, but only one at a time.
>
> Since this thing is shortly going to carry me into the wild blue yonder, I
> want to be certain there is nothing I am doing wrong. I am used to
Lycomings
> and the Rotax engine with the choke is a little bit different. I cleaned
out
> the plugs on #3, even though they were not bad and I don't think it
continued
> to miss there. The exhaust pipe is black and it has spit out black residue
I
> can see on the white paint, and that seems like it is rich -- maybe I am
> using too much choke?
>
> Any ideas out there?
>
> Thanks,
>
> Dave
> A227
> mini U2
|