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Date: Sat, 19 May 2007 19:13:31 -0600
From: Bob White <rlwhite@comcast.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Frustration. The seriesl....
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Hi Buly,

Here's a possibility.  Maybe the shielded wire is giving you a lot of
capacitance to ground.  When you do a DC test by shorting the pin to
ground it would work fine, but the pulses from the EC2 could be
attenuated or have a very slow rise and fall times throwing the
injector timing and pulse width off.  If it isn't too hard to do, you
might try making sure the shield isn't connected to anything at either
end.  If that's the problem, I ungrounding it would help. 

Bob W.

On Sat, 19 May 2007 19:47:15 -0400
Bulent Aliev <atlasyts@bellsouth.net> wrote:

> Al,
> I have two EC2's. Bob White sent me his to test against mine. The NOP  
> is flashing on both and A/B processors too.
> I have power to pins 33 and 34.
> Spark plug / ignition test on Mode 8 works fine.
> 2 Serial leads have connectivity between EC and EM.
> Since I have a second EC to swap, the EC is not a suspect.
> During the Tracy's update I replaced the single wires to the  
> injectors with two pairs of shielded 18 gauge I got at S&F.
> I started suspecting the wire, since it has one blue and one white  
> wire inside. The number on the wire is: 2112/202SJ-18 1F2Y2.
> I thought it may be a some kind of resistor wire? But we tested  
> resistance, and checked fine?
> Thanks Al. Looks like I need dumb luck to get out of this one :)
> Buly
> 
> On May 19, 2007, at 8:29 PM, Al Gietzen wrote:
> 
> > Buly;
> >
> > Two things:  Have you checked that the processor chip(s) are fully  
> > seated in
> > plug (base); and -  is the behavior the same for both controllers?
> >
> > If you have +12 power to pins 33 or 34, and you have the serial lead
> > connected to the EM2, and the processor in functioning, you should  
> > not see
> > NOP.  Possibly something has happened in shipping or handling.  If the
> > processor is not functioning of course you can not trigger the  
> > injectors.
> >
> > Good luck,
> >
> > Al
> >
> >
> > --
> > Homepage:  http://www.flyrotary.com/
> > Archive and UnSub:   http://mail.lancaironline.net:81/lists/ 
> > flyrotary/List.html
> 
> 
> --
> Homepage:  http://www.flyrotary.com/
> Archive and UnSub:   http://mail.lancaironline.net:81/lists/flyrotary/List.html


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