Mailing List flyrotary@lancaironline.net Message #6041
From: David Leonard <Daveleonard@cox.net>
Subject: RE: [FlyRotary] Re: 13B - No start problem
Date: Sat, 28 Feb 2004 09:22:50 -0800
To: 'Rotary motors in aircraft' <flyrotary@lancaironline.net>
Message

Thanks Ed and Rusty.  Now comes the dreaded work of tracking down my wiring error.  I had earlier suspected a problem because when ever there was power to the main buss the light on the EC2 would come on, indicating there was power to the EC2 coming through the injectors.   Tracy said this was normal, but maybe he was thinking that the engine was running.  I am sure that the injectors are open because the system will not hold pressure unless I remove the fuses to the injectors.  But remove the fuses on the hot side of the injectors and the light on the EC2 goes out and the system holds pressure.  This happens with either the primary or the secondary injectors.

 

I am also having trouble picturing where I could have gone wrong in the wiring.  It seems unlikely to me that I could have grounded all 4 of the injector leads.  Your idea about testing with the main connector unplugged is a good place to start.  But assuming that checks out OK (no ground with the connector unplugged), I really would have no idea what to do next.  I can’t believe that I would put all 4 injector leads in the wrong hole.  BTW, I did not install an injector disable switch.

 

David Leonard

The Rotary Roster:

http://members.aol.com/_ht_a/rotaryroster/index.html

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of
Russell Duffy
Sent: Saturday, February 28, 2004 6:31 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: 13B - No start problem

 

With the injectors connected to the main buss, when ever there is power to the injectors they are OPEN!!!  This occurs even when the EC2 does not have power.  As I was trying to adjust my fuel pressure and check for leaks (there were only 4 ;-) I had about 10 min of pump running time with the injectors open before I discovered the issue.  Now I'm sure I have quite a puddle of fluid inside the intake and rotor chambers. 

Hi David,

 

I agree with Ed, and everyone else who said the injectors should not be open just because they have power on them.  Are you sure they were open, or did you measure 12V on them and assume they were open? 

 

Try this- turn the power back on to the injectors, and measure from each connection on the injector to ground with a voltmeter.  As Ed indicated, you should see 12V on both connections to show that the injector is off.  If you see 12V on one, and ground on the other, unplug the main EC-2 connector and check again.  If you still have ground on one side, you have inadvertently grounded the injectors in your wiring somewhere, which will cause an extremely high idle speed :-)

 

Good luck.

Rusty (I want to make noise again)

 

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