I made a trip to South Carolina on Friday to replace
the fuel injectors, and do some flying.

I bought four RC Engineering injectors to replace my
stock Mazda 550cc injectors.  I had suspected that one
or more of my injectors was letting fuel leak by
causing the engine to run rich.

After dealing with some issues with fuel leaking from
one injector seat, I finally got it resolved and
started the engine.  I still have the same issue
running too rich, though now I can turn the mixture
full CCW and I do get a change on the A/R guage.  I
still don't know why my mixture all of the sudden went
rich.  I had the engine tuned perfectly, and all of
the sudden it went rich.  

I've changed the fuel pressure regulator, and now the
injectors with little improvement.  I also ran the
EC-2 back to default, and started tuning again with no
help.

The engine is running fine, and is probably OK to fly.
 On my last flight the mixture at low cruise was right
on the money, and the rich issue is only at lower
power settings.

Yesterday, I switched to the "B" controller, and the
mixture was better and adjustable, but after switching
to "A" and back to "B" it then seemed to be about the
same again.  

I'm going back to the airport today for some more
testing, tuning and hopefully a flight.  Maybe today
will produce some better results, because yesterday
certainly didn't go very well.

I do like the idea of have new fuel injectors though.
The RC Engineering injectors mounted pretty good in
place of the old injectors.  The electrical connector
is different, but I had already discovered that, and
order 4 new connectors.

Steve Brooks
Cozy MKIV
Turbo Rotary