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Hi Chris,
Good to hear the rotary is humming again. Can't help
you on the EM although without anything showing on the screen I would agree that
power is the first place to start trouble shooting. Unplug the EM2,
determine which pin of the plug should have power and test with a volt meter
with the power switch on. If that is OK, next check to see if the
grounding pin is actually grounded. You could have power to the EM2, but
if you have no ground, then you will have no current flow.
Regarding shut down. You will never get immediate
engine stoppage by shutting off the fuel pumps. The reason shutting
down the fuel pumps does not result in immediate engine stoppage, is that you
still have pressurized fuel remaining in the injector hoses and, of course, the
injectors are still firing. Since you are presumably at idle rpm, there is
only small amounts of fuel required to keep the engine running and this
means the engine will keep running until that fuel is depleted - sometimes for a
number of seconds - it all depends on the volume of fuel in those hoses and
fittings..
I agree killing the ignition can lead to a small amount of
fuel pumped in - whether its enough to flood the engine, I doubt it.
However, I used the injector disable switches which when turned off - kills the
engine immediately because, of course, the injectors stop firing
immediately. Turning off the EC2 would accomplish the same thing.
While its true if you have a leaking injector this
method (turning off the injectors) could lead to flooding of the engine, I
would suggest that this would be a welcomed warning of a potentially failing
injector - better to find that out on the ground by a flooded engine than
in the air. But, that is just my opinion.
Another reason why I favor the "kill the injector" method
is for safety also. If someone approached the spinning prop, my immediate
reaction would be my normal method of killing the engine, chopping down on the
injector disable switches. The engine will stop within one revolution of
the blade using this method whereas if your habit is to kill the fuel pumps the
engine will continue for a number of revolutions. The chances of this
happening are remote - but not zero. Just something to
consider.
Best Regards
Ed
----- Original Message -----
Sent: Sunday, June 24, 2007 9:48 AM
Subject: [FlyRotary] ECU/EM upgraded...a couple of
questions
>I got my ECU and EM
back yesterday and installed the ECU. It was really nice
> to have the
upgrade that allows diagnostic modes. Hit the button and you can
> really
hear the injectors clicking as if you are at 3000 RPM's. Very
>
reassuring
>
> The engine started after only a couple of minutes
the first time and then
> started easily after that. As a matter of fact,
it is stopping the engine
> that has been curious. I will turn the fuel
pump off but the engine will
> continue to run for several minutes after
the pumps are off (I can still
> kill the system by flicking the
coils/injectors off but I believe this can
> lead to flooding and is "bad
form"). Actually, the engine really sound nice
> just before it does stop
due to fuel starvation....yeah, I think I am
> running really rich 'cause
when I lean, it really smoothes out.
>
> I am having a another
problem though which is really bugging me. I can't
> seem to get the EM
(Engine Monitor) to come online. The screen remains
> blank. This is the
same as was happening before I sent it and the ECU back
> to Tracy for
upgrade. Tracy ok'ed the units, but my screen is still blank.
> It seems
to not be getting any power. I have checked and rechecked the
>
wires. I do NOT have all the sensors hooked up yet, but it is my
>
understanding that all you should need is power and the data in/data out
and
> you should get some base readings.
>
> I was stupidly
careful about having all power disconnected and made a
> cursory
investigation as to the grounds before time ran out. Does the unit
>
have an "on" switch that I am missing, or does it come up when ships
power
> is applied?
>
> Please, what am I missing? I would
really like to see what is actually
> happening in my engine. I would also
feel ok to run it longer if the reading
> seem "normal"....or at least
workable. But, until I can get the monitor up
> the engine tweaking is
limited.
>
> I was only able to "play" with it a few minutes before
I had to go home and
> go to bed (4:30 am comes very early, and yes, I
work weekends.....but I am
> off tomorrow and Tuesday <yea>), so I
still need to investigate. However,
> anything obvious that jumps out at
y'all that could help is appreciated.
>
> Thanks again.
>
> All the best,
>
> Chris
>
> Christopher
Barber
> Attorney and Counselor at Law
> 5110 Bissonnet, No
418
> Bellaire, Texas 77401
>
> Serving the Needs of Senior
Texans
>
> 281-464-LAWS (5297)
> 281-754-4168 Fax
>
www.TexasAttorney.net
>
>
> --
> Homepage: http://www.flyrotary.com/
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