I don’t think it is fuel filter
related. The fuel pressure is holding steady during this time. I think it is
some kind of misfire, but have no clue as to what could be causing it or how to
go about diagnosing it. It is both random and intermittent and happens at
various rpms. Nothing seems consistant about it happening.
What should I check?
Bill B
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]
On Behalf Of Tracy Crook
Sent: Tuesday, May 04, 2010 12:53
PM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Re: tuning
issues
Anything that causes a
misfire will cause the mixture to indicate lean. Remember, it's an Oxygen
sensor. If you don't burn the fuel it's got a lot of that being pumped
down the exhaust making the instrument think things are Very lean..
Problem may not be fuel related at all.
Tracy
On Tue, May 4, 2010 at 11:46 AM, Bill Bradburry <bbradburry@bellsouth.net> wrote:
After I get the engine running smoothly in a range, it will
occasionally
hiccup. When it does, the mixture will then go down sometimes off the
scale, then come back to where it was. I have not noticed any dips in the
MAP table at these locations.
Any ideas, suggestions?
Bill B