I may be taking it back what I said about
the MAP table. During my runup today, I noticed that the fuel pressure
was dropping. At full WOT, the pressure dropped to below 20 psi. I engaged
the secondary fuel pump and the pressure came back to the 40 lb range. It
appears that my fuel filter after the primary pump may be partially
clogged. I will clean them tomorrow and let you know what I find.
Bill B
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of Bill Bradburry
Sent: Wednesday, January 12, 2011
11:58 PM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Re: Apex
seals and MAP table corruption?
Brian,
If I understand it correctly, the
secondary should come on to make up for the loss???
Bill B
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of bktrub@aol.com
Sent: Wednesday, January 12, 2011
11:23 PM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Re: Apex
seals and MAP table corruption?
Isn't the engine running soley on the
primaries when it is at idle? Wouldn't that explain it's not wanting to run
when you cut off the primaries at idle?
-----Original
Message-----
From: Bill Bradburry <bbradburry@bellsouth.net>
To: Rotary motors in aircraft
<flyrotary@lancaironline.net>
Sent: Wed, Jan 12, 2011 6:45 pm
Subject: [FlyRotary] Apex seals and MAP table corruption?
Chris, what is the latest scoop on the
stuck apex seals? Did they free up?
I currently have every thing (cowl,
inspections plates, etc.) opened up so I can’t investigate this further
right now, but the last time I taxied my plane, I noticed that it was really
lean at idle (took mixture knob to 4 pm) and when I ran it up, I could only get
a little over 6K (previous would go to 6900!) rpm and the mixture knob full
rich would not bring the mixture bar graph visible. I am pretty certain
that my MAP table is corrupted. This is the first time this has happened
to me.
I am pretty certain that it was the time
before that I switched the CPU from “A” to “B” and
tested my coils. This was the first time I had done this. I
normally just run it in “A” and am trying to get the tuning in so I
can copy that to “B”.
Also, when I test the injectors…I
have only done this at idle, if I disable the secondary, it stumbles, but keeps
running. When I disable the primary, it would die if I didn’t
immediately switch it back. Sounds like the cold start might not be
engaging on the primary??? Does anybody have any suggestions?
Those of you who have had your MAP table
corrupted, was a switch between CPUs and or coil testing involved prior to the
problem? Could there be some involvement here???