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1. 05:16 PM - Re: Lousy Idle (Miguel Azevedo)
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Dean,
Have you notice any symptons of engine running richer and richer as the idle
slows down?
Like brown smoke coming out of exhaust?
If you have a paper air filter, try without it. I've seen some paper filters
clog up under higher temps.
Cheers,
Miguel Azevedo
N8714D
PA22/20-150
On Wed, Dec 31, 2008 at 3:42 PM, DEAN PSIROPOULOS <
dean.psiropoulos@verizon.net> wrote:
> dean.psiropoulos@verizon.net>
>
> Anyone have a few words of wisdom for me:
>
> I'm pulling my hair out over a crappy engine idle that I can't seem to
> tame.
> The basic problem is that I'll start the engine and it fires right up and
> runs at about 700-750 RPM just like the book says it should. But from
> there, all it seems to want to do is gradually idle slower and slower as
> the
> engine warms up until it barely runs (between 450-500 RPM) by the time I've
> done all my checks and am ready to take the runway for takeoff.
>
>
> The engine is a new Mattituck built TMX-IO360 Lycoming clone with
> Lightspeed
> electronic ignition on one side and a magneto on the other. It also has
> Airflow Performance fuel injection with purge valve, a Sterba wood prop and
> Mark Landoll's 11 pound steel inertia ring bolted to the flywheel. The
> configuration is updraft with the AFP fuel controller bolted to the bottom
> of the sump (like carbureted engines) and uses Van's airbox. I've read the
> AFP manual and talked to the tech there and adjusted the idle mixture and
> stop numerous times but I can't seem to stabilize it. When I have the
> cowling off, I make the adjustments and taxi around a bit to warm up the
> engine and it seems to be ok. Then I'll put the cowling back on and the
> symptoms seem to reappear. There isn't anything banging against the
> cowling
> that I can see that would be causing trouble so I'm totally stumped!
>
> Anyone else having this problem? I'm flying out of a long but narrow strip
> with trees on three sides and no good places to land near the airport.
> Needless to say it makes me nervous, even though the engine runs strong
> just
> off idle and at full power. Thanks.
>
> Dean Psiropoulos
> RV-6A N197DM
> 4.1 hours
>
>
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