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John, as always a bit difficult to diagnose a problem via e mail
However, it may be that since you do manage to get it running for short
spurts, it sort of sounds to me like a fuel problem. Generally if it were an
ignition or timing problem it would not be intermittent. Popping possibly
indicates too lean a mixture. My experience is that once you get the engine
running it takes an large amount of fuel to drown out the engine and stop
it. However, too little fuel will make it very hard to start and you can
get the lean popping or course if its flooding then its also difficult to
start..
On the otherhand, your reports of "fouled" spark plugs would tend to
indicate too much gas/oil so difficult to say.
I think I would try to eliminate the problem one step at a time. If you are
getting spark and the timing seems to be correct, then I would turn off the
fuel pumps and injectors. Clean your plugs and let the chamber dry out a
bit. Then pour an ounce or so of gasoline down the intake (spread between
the runners as best you can) and then turn the ignition on and attempt a
start. If you get it to run for a couple of seconds before it exhausts the
fuel then I think that would indicate a fuel problem. If this does not
affect the problem then its probably not a fuel problem.
I think 5 amps might be a bit small for the ignition modules but 10 amps
should be plenty.
Ed Anderson
RV-6A N494BW Rotary Powered
Matthews, NC
----- Original Message -----
From: "John Slade" <sladerj@bellsouth.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Saturday, February 28, 2004 8:54 AM
Subject: [FlyRotary] Re: EC2 - No spark problem
> > Congratulations on your first start, John.
> Thanks, Paul, but I'm not out of the woods yet. You could still this one.
>
> Last night, after about 6 attempts with spark plug cleaning (compressed
air)
> in between I managed to get about 20 seconds of run time. Then my ignition
> switch fuse (5amp) blew. I replaced it with a 10amp. It sounds great when
it
> runs. Most of the time it just pops (if that) and puts out smoke, barely
> keeping up with the starter until the battery gets weak. I've also tried
> jump starting with the car which helps get the same results for longer :(
>
> Each time I check the plugs I find that the trailing plugs are very oily.
If
> I tap them on my hand I get quite a bit of liquid out. The leading plugs
are
> also wet, but not oily.
>
> I've tried lowering the mixture, cold start off or on, selecting computer
A
> or B none of which seem to make any difference.
>
> Any other suggestions anyone?
> Note that this is a turbo 3rd gen with high compression rotors.
> Regards,
> John
>
>
> >> Homepage: http://www.flyrotary.com/
> >> Archive: http://lancaironline.net/lists/flyrotary/List.html
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