Sender: <marv@lancaironline.net> (Marvin Kaye)
To: flyrotary@lancaironline.net
Date: Sat, 03 Apr 2004 22:41:52 -0500
Message-ID: <redirect-3144586@logan.com>
From: Dale Rogers <rogersda@cox.net>
Subject: Re: [FlyRotary] Rusty's O2 / EM2 problems.
MIME-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit

John, 

   Since I don't have an EC2 (yet?), I'm not qualified to 
address the specifics, but in general ...

> Bottom line with my engine seems to be that, unlike me, its VERY VERY rich.
> You can't use mode 3 with the engine off, and it won't start. :(
> 
> Even with the new EGO sensor, my air/fuel gauge is doing weird stuff again
> (when it did run yesterday). Mostly it seems to sit in the middle whatever I
> do with the mixture. Exhaust (when it runs) is visible BLACK soot. On the
> prop, in the air, on the exhaust, and presumably all over the o2 sensor.
> Even the oil seems to be absorbing black particles. After cranking the plugs
> are soaked. If it runs they're black.

   Under what conditions would the computer think that the 
engine needed *more* fuel?  Temp sensor too low?  Map sensor output?  Tach signal noisy?  

   Do both halves of the EC2 run (or rather, not) 
essentially the same?  If so that eliminates any sensors 
not shared.  Any chance you can scope the way the sensor 
signals are amplified?  Any way to compare the injector 
pulse width at a given RPM with a spec?  

Just some thoughts,

Dale R.
COZY MkIV #1254