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if this was a car, i would ask if you had done any work on the fule sys? so often i find floting sliacon in the fuel. from the fuel sender gasget, teflon tape on threads.
remove all fuel and run it from a jerry can to the runner.2 cents
steve parkins
To: flyrotary@lancaironline.net
Date: Tue, 4 May 2010 14:53:12 -0400
From: tracy@rotaryaviation.com
Subject: [FlyRotary] Re: tuning issues
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
The New Busy is not the too busy. Combine all your e-mail accounts with Hotmail. Get busy.
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