John,
Sorry to hear about your troubles. I
think it is safe to say that we’ve all been there at one point or
another. I have two suggestions for you to try. This sounds real
elementary, but I think you should check the voltage while cranking the
engine. If it drops below about 9.5v, the EC-2 wont’ fire the
coils. I had a bad battery at one point and it would appear to take a
charge, but the capacity wasn’t there. As soon as I tried to crank
the engine the voltage would drop way down preventing the engine from starting.
I replaced the battery and the engine started right away.
If the battery checks out OK, then I would
remove the crank-angle sensor and take a (good) spark plug and hook it up to
one of the high tension coil wires, lay it on the engine for grounding, then power
up both the EC-2 and the ignition coils, and then spin the CAS by hand. Watch
for a spark. If everything is wired correctly (and working), you should see
the plug spark.
Mark S.
From: Rotary motors in
aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of John Slade
Sent: Sunday, May 15, 2005 7:57 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] EC2- What am
I missing?
I'm finally done with the rewiring. I've replaced all 18
wires from the EC2 to the PCM and the EM2 with shielded 22g and checked
each one three times for continuity. I still get "nop" from
the EM2 (i.e. no communication with EC2). There seems to be no spark or fuel
while cranking which leads me to think that the EC2 is not triggering the coils
or the injectors on either computer. There's 12v on both the EC2 power pins,
and a good ground on the ground pin. The cold start / injector disable
grounds the cold start pin correctly. The coil disable functions ground the
pins correctly. I'm running out of things to check, other than check the
same things again. I hate to say it, but I'm beginning to think that the EC2 is
dead - but then it was checked as good by Tracy
before he shipped it. I did hook it up when it arrived, and ran the engine
briefly on the B computer. I've no reason to think this hookup to the old
wiring fried the computer since my old computer checked out good when returned.
Yet another check of the wiring tomorrow, then I'm totally stumped. 
Could I be missing something obvious?
John (how do you spell frustrated?)
PS - No jokes Rusty - I'm just not in the mood :)