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I don’t think B would be meaningful
since
it is so different. Do you agree?
No. Not at all. Try it. There is almost nothing you can do with the EC2/3 to make the engine miss as you describe. Besides, the fact that B has not been adjusted is a good reason TO try it. You have nothing to gain by NOT trying it.
The first thing to try is always switching to the backup controller.
I have talked to more than one builder who had engine anomalies bad enough that they made precautionary landings and still never tried the backup controller. I still don't understand the reluctance to throw that little switch.
Tracy
On Tue, May 4, 2010 at 2:30 PM, Bill Bradburry <bbradburry@bellsouth.net> wrote:
None of the changes made on A during the
tuning process has been transferred to B. I don’t think B would be meaningful since
it is so different. Do you agree?
Bill B
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]
On Behalf Of Tracy Crook
Sent: Tuesday, May 04, 2010 1:34
PM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Re: tuning
issues
When something is truly
random, there are no clues. You have to check everything. What have
you checked? Try the easiest things first. Flip that little switch.
Does it do the same thing on both controllers?
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
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