cookflys
Joined: 13 Jan 2009
Posts: 17
Location: atlanta
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 Posted: Thu Mar 22, 2012 12:59 pm Post subject: Kitfox-List Digest: 3 Msgs - 03/21/12 |
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Thanks to all who responded. I totally forgot to look for Mikes trouble shooting.
I usually go right to him for information and keep a hard copy in shop.
Sent from my iPad
Charles Cook
On Mar 22, 2012, at 3:00 AM, Kitfox-List Digest Server <kitfox-list(at)matronics.com> wrote:
[quote] *
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Kitfox-List Digest Archive
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Total Messages Posted Wed 03/21/12: 3
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Today's Message Index:
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1. 11:20 AM - Re: Ignition problem (mikeperkins)
2. 03:28 PM - Re: Re: Ignition problem (Noel Loveys)
3. 03:58 PM - Re: Re: Ignition problem (Dave)
________________________________ Message 1 _____________________________________
Time: 11:20:41 AM PST US
Subject: Re: Ignition problem
From: "mikeperkins" <michael.perkins(at)rauland.com>
I've not seen this exact problem, but I have a few thoughts based on the assumption
that the system once did not perform this way.
The 582 has the Ducati ignition system, meaning it's an electronic version where
the coils and the tach are operated by a module. Here are the possibilities
as I see them:
1) There is an open ground either at the ignition switch, ignition module, or the
tach. (Missing grounds can make very strange things happen.)
2) There is a short between one of the ignition cutoff wires ("mag" leads) and
the tach lead.
3) The ignition module is bad.
Here's what I'd do to troubleshoot.
With all leads removed from the ignition switch, check that it works properly with
an ohmmeter (that the keyswitch connects the right terminals in the right
positions, and also not in the wrong positions.) Also check for a short between
the both mag leads and the tach wire.
If everything seems ok to this point, or you can't test the switch easily, still
leave the switch disconnected and hookup jumpers that can allow you to test-run
the engine without the ignition switch - so you can start the engine and do
an individual "mag check" with the engine running. See if the tach behaves.
If the tach still misbehaves, then it's likely a bad ground somewhere on the ignition
module or (ugh) a bad ignition module.
I'm sure you see the basic idea - check for problems with the switch and the wiring.
. . . and then run the engine isolated from as much of the aircraft wiring
as possible to see if the Ducati ignition module is good or bad.
Hope this helps.
Mike Perkins
Kitfox Model I (1994)
532 / GSC prop
TC and FA
Electronic Engineer
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Mike Perkins
EAA TC/FA
Havana, Illinois
Model I, 532, B gearbox, GSC prop
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=369069#369069
________________________________ Message 2 _____________________________________
Time: 03:28:41 PM PST US
From: "Noel Loveys" <noelloveys(at)yahoo.ca>
Subject: RE: Re: Ignition problem
It's been a while since I've looked at the schematic for the 582 but if I
remember correctly the tachometer does NOT go through the ignition module
but operates from a separate coil in the magneto. There have been problems
with the Westach tachometer seeing either too much or not enough voltage on
the tach coil. My advice is what I did and get a TinyTach just be sure to
wrap BOTH wires to either cylinder so it will read with either mag coil
turned off.
Noel
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_________________
Charles Cook
Model II 582
#363 |
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