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From: "Ed Anderson" <eanderson@carolina.rr.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-2572585@logan.com>
Subject: Re: [FlyRotary] Hard starting - problem solved
Date: Sat, 8 Dec 2007 15:45:22 -0500
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Its amazing how many times you discover that a "new" problem resulted from 
fixing an "old" problem.  Glad to got it sorted out Steve.  So it appears 
that our "global" malfunction checklist now needs to have added:

Not only check to make certain there is a manifold hose connected to each 
EC2 manifold pressure sensor, but check that the tubes flow air.  I imagine 
that just taking the EC2 end of each hose and gentle blowing into it 
(keeping the moisture out) or using a low pressure air from a hose would 
quickly establish whether you have a clear line between manifold and sensor.

Is this the turbo mod that puts on a larger compressor wheel and then mills 
out the area around the turbine wheel to lower the boost??

Ed
----- Original Message ----- 
From: "Steve Brooks" <cozy4pilot@gmail.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Saturday, December 08, 2007 3:31 PM
Subject: [FlyRotary] Hard starting - problem solved


>I had a very productive day at the airport today.  The problem with hard
> starting turned out to be two separate problems, but both were self
> inflicted.
>
> Problem 1 - I pulled the spark plug wires from the rear rotor (all of 
> about
> 6" long) to measure the resistance, suspecting an open wire.  The first 
> one
> measured the same as a new one (originally bought set of 8), and when I
> tried to measure the second one, I couldn't get contact with the plug end.
> The connector had been pushed all of the way to the rear of the boot.
>
> Obviously when I did my conditional inspection, I did this when putting 
> the
> plug wire back in after checking the compression.  The spark plug wire, if
> touching the plug at all, would have been barely making contact.  I 
> suspect
> that it was probably jumping the gap.  When cranking, it probably wouldn't
> have jumped much of a gap, but when running, and charging, it probably was
> doing better.  I couldn't get the boot to slide back into place, so I just
> replaced it with a new one.
>
> The plane started right up, and ran just as it always had.  That is until 
> I
> switched to controller "B"
>
> Problem 2 - When I switched to controller B, the engine ran terrible.  It
> didn't die, but I think that it would have if I left it there a while.
> While I was troubleshooting the hard starting, I decided to fix a coolant
> leak that I have had for a while on the intake manifold.  With the colder
> weather, the leak was more than the usual little puddle on top of the 
> intake
> manifold that I saw there on occasion.  I had bought a new intake gasket
> with the intention of replacing it, but just hadn't gotten to it.  When I
> replaced it, I also decided to put a film of Ultra Gray silicone, on each
> side, just to make sure that it sealed.  Well, what it sealed really well
> was the vacuum port that I was using for a MAP input to the controller. 
> In
> trouble shooting, I had reversed the two MAP lines on the controller, so
> originally, it was on controller A, but now it was on B.  It wasn't until
> the engine was running normally on A, that it became noticeable.  Before 
> it
> ran lousy on both controllers.
>
> After running it some more, I noticed that I still did have a slight 
> coolant
> leak, which I think was on the coolant connection of the turbo.  On the 
> back
> side of course.  Since I was suppose to ship the turbo off two weeks ago, 
> to
> have the hybrid upgrade done to it, I decided to go ahead and pull the
> turbo.  Especially since the weather was warm today.
>
> While the turbo is at the shop, I'm going to pressurize the cooling 
> system,
> just to make sure that I don't have any other leaks.  That way once the
> turbo comes back (3-4 weeks) I'll be all set to go.
>
> Thanks for all of the suggestions.
>
> Steve Brooks
> Cozy MKIV
> 13B Turbo
>


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