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Steve, the first thing I would do is:
1. Check that the EC2 injector simulation mode (mode1) is firing all the injectors
2. Check that the EC2 Ignition Simulation mode (mode8) is firing all the plugs
I don't know if this could possibly be the case with you, but since you were doing some electrical work, I'll suggest it anyway.
Turn off one set of your injectors and try the mixture control. If you find the mixture control is not acting as before, the system could be in "cold start" mode. I damaged the EC2 once by trying to plug in an electrical device to interface with the EC2. The engine would run on all four injectors (and then poorly at low rpm) if I turned the mixture max lean (CCW), however, it seem to function properly with one pair of injectors turned off.
Later Tracy discovered that I had fried the B controller and had caused the A controller to go into "cold start" mode. That caused too much fuel flow with 4 injectors, but when I cut out one pair, then the mixture controlled exercised its normal control
So you might just turn off one pair and see (I'd recommend turning off your secondary).
If that does not seem to help, I think the next thing I would check is the compression of my rotors. If for some reason you have some faces with low compression, that can hinder starting.
Hope this helps
Ed
----- Original Message ----- From: "Steve Brooks" <cozy4pilot@gmail.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Friday, November 23, 2007 8:39 AM
Subject: [FlyRotary] Hard Starting
I have an issue all of the sudden with my 13B Turbo not wanting to start.
It will fire occasionally, but just won't start running.
If I am persistent enough (and have enough battery), It will finally start,
but does not run well. Seems to have a miss in it. It runs better if I turn
the mixture to lean, in fact, I can turn the mixture all the way counter
clock wise. I think that it used to die when I would do that. When I
switch to controller B, it runs better for a few seconds, and then goes back
to missing. It doesn't start any easier on controller B either.
I haven't done a lot of troubleshooting on it yet, but wondered if anyone
has had a similar issue. I did replace the spark plugs, but that didn't seem
to help any. I still have the stock turbo on it, so, maybe the turbo is
starting to go. It also started this problem, after I fixed a problem with
the starter. My Cessna ignition switch got some water in it and it got to
where it wouldn't engage the starter. I took it apart, and cleaned all of
the contacts to fix it. I have that switch also wired to do the coil test
when you select mag1 or mag2 on the switch. The coil test only works on
controller B though, so I don't think that would affect controller A.
I guess that maybe my next step is to verify that I'm getting spark on all
plugs, and then maybe try removing the plumbing to the throttle body, and
try starting it then. That should verify if my turbo is failing, and
restricting air flow.
Steve Brooks
Cozy MKIV 13B Turbo
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